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• Is there such a thing as a virtual COM port receipt printer?

  - by Blorgbeard

  I'm debugging some code that writes directly to a COM port in order to print receipts on a receipt printer. The printer model is something like an Epsom TM-88. Instead of printing reams of thermal paper while debugging this code, it would be nice if I could use some kind of virtual printer. Like PDFCreator or FinePrint, but with a virtual COM port instead of a virtual windows printer. Does anyone know of such a thing? Edit: The code sends control characters to get bold text and other formatting. I'd like to see this in the output if possible.

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• Time zone for Force.com API fiscal date literals?

  - by Nick

  I have a question about fiscal date literals in the Force.com API (http://www.salesforce.com/us/developer/docs/api/Content/sforce_api_calls_soql_select_dateformats.htm): For which time zone are date ranges calculated? For example, suppose we execute the query: SELECT Id FROM Opportunity WHERE CloseDate = THIS_FISCAL_QUARTER where, according to our company's fiscal settings, THIS_FISCAL_QUARTER runs from Jan 1 to Mar 31. Does the range for THIS_FISCAL_QUARTER use... the user's time zone? For example, if the user's time zone is GMT-8, THIS_FISCAL_QUARTER = Jan 1 00:00 GMT-8 to Mar 31 23:59 GMT-8 (or Jan 1 08:00 UTC to Mar 31 07:59 UTC) the company's default time zone (according to the company profile)? For example, if the company's default time zone is GMT-8, THIS_FISCAL_QUARTER = Jan 1 00:00 GMT-8 to Mar 31 23:59 GMT-8 (or Jan 1 08:00 UTC to Mar 31 07:59 UTC) UTC? THIS_FISCAL_QUARTER = Jan 1 00:00 UTC to Mar 31 23:59 UTC something else?

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• Is there a COM object that just implements IUnknown I can use?

  - by Matt

  For an asynchronous Windows API, I can provide an IUnknown state parameter to associate calls to the API with calls from the callback. It's my understanding that COM guarantees that two IUnknown pointers to the same object will be of the same value. Thus, if I only want to associate API calls with callbacks, IUnknown should be all I need, by comparing the values of the pointers. Is there a stock implementation of IUnknown I can use? Of course it would be trivial to implement myself, but for such a base component of COM, I'm wondering if Windows or ATL provides one I should use instead. Thanks, --Matt

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• Deploying 32 and 64 bit COM objects on 64 bit machine from one VS setup project MSI.

  - by hooligan

  I have a Shell Namespace Extension C++ COM DLL that must have both a 32 bit and 64 bit version installed on a 64 bit machine, because when 32 bit applications perform a file- open the dialog that is presented is a 32 bit shell. The problem is that both my 32 bit and 64 bit COM objects have the same progid and the VS setup project will throw an error when including two files with the same progid. How do I get around this issue if I want to maintain the same code for both 32 and 64 bit? Currently I just have two different MSI's (32 and 64) and they both must be ran on the 64 bit machine.

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• What are the essential COM components required for burning DVD in Windows XP using .NET?

  - by shruti

  I'm trying to burn DVD/CD through frontend C# code... i have used IMAPI2 for buring CD/DVD in windows XP..but it is giving me unhandled exception... as:- System.InvalidCastException: Unable to cast COM object of type 'IMAPI2.Interop.MsftFileSystemImageClass' to interface type 'IMAPI2.Interop.MsftFileSystemImage'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{7CFF842C-7E97-4807-8304-910DD8F7C051}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)) can anyone please help me out to solve this problem. I'm not able to solve this error. this project is working fine in Windows7 but unable to work with XP.

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• What are the essential COM componenets required for burning DVD in c#.net in Windows XP?

  - by shruti

  im trying to burn DVD/CD through frontend C#.net code... i have used IMAPI2 for buring CD/DVD in windows XP..but it is giving me unhandeled exception... as:- System.InvalidCastException: Unable to cast COM object of type 'IMAPI2.Interop.MsftFileSystemImageClass' to interface type 'IMAPI2.Interop.MsftFileSystemImage'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{7CFF842C-7E97-4807-8304-910DD8F7C051}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)) can anyone plz help me out to solve this pbm...im not able to solve this error.. this project is working fine in Windows7 but unable to work with XP...???

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• Can an out-of-process COM object determine its parent process?

  - by Tom Williams

  From an out-of-process COM object (LocalServer32) can I determine the client process that requested the creation of the object? - to be specific I need to get hold of the client processes command line. This question arrises because (due to poor standardisation, implementation and support) the potential 3rd party clients of the object have a variety of idiosyncracies which the object needs to workaround. To do this the object needs to be able to identify its current client. Extending the interface of the COM object so that the client can identify itself is unfortunately not possible ... or to be more precise the interface can be extended but I won't be able to get the clients to call the extension.

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• How do I request a single random row from a force.com database in SOQL?

  - by Ollie C

  Total row-count is in the range 10k-100k rows. Can I use RAND() on force.com? Unfortunately although all the rows have a unique numeric identifier, there are many gaps, and I'd often want to select a random row from a filtered subset anyway. I suspect there's no particularly efficient way to do this, but is it possible at all? Ultimately all I want to do is to extract one row from a table (or a subset based on specific filter criteria) at random. If force.com doesn't let me select a random row, then can I query the rows to select from, and assign sequential IDs to all the rows, say 1-1,035, and then select a random number in that range locally, say 349, and then get row 349?

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• Postfix - How to alias some user@host.com to another user, but only for certain values of "host.com"

  - by Rory McCann

  I have a Postfix email setup. It's handle a few domains (i.e. I have them in my mynetworks in my main.cf). I have a normal unix account and use that to log in, and get my mail. My personal email account is of the form user@personal.com. I have a new domain new.com, and I want to forward info@new.com to user@personal.com, however I don't want to forward info@personal.com. Someone has suggested just forwarding all 'info' to 'user', and then using procmail on my user@ account to remove the info@personal.com The server is Ubuntu.

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• How to remove "com.starfield.backupservice" from launchd?

  - by user556623

  I remember sometime ago, I uninstall an application called starfield, but probably I didn't do a clean uninstall. Now in Console, I always see a annoying message: com.apple.launchd[1] (com.starfield.backupservice[4441]) Exited with exit code: 1 com.apple.launchd[1] (com.starfield.backupservice) Throttling respawn: Will start in 10 seconds com.apple.launchd[1] (com.starfield.backupservice[4442]) posix_spawn("/Applications/Starfield/BackupService/offSyncService", ...): No such file or directory I know it could be something wrong with my installation, how can I do a clean uninstall now, or just fix this issue, I don't want to see this message from my console any more. Thanks.

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• OpenWRT based gateway with dnsmasq and internal server with bind

  - by Peter

  I have router based on OpenWRT which has dnsmasq 2.59. Inside my local area network I have a NS server bind. This server has internal and external views for a couple of my domains. My router forwards port 53 TCP and UDP from outside IP (router WAN) to this server. For the external clients everything works fine. In order to organize the internal view, I decided to add the exception to /etc/dnsmasq.conf server=/mydomain1.com/192.168.1.1 server=/mydomain2.com/192.168.1.1 server=/mydomain3.com/192.168.1.1 (192.168.1.1 - IP address of the NS server) According to dnsmasq manstrong text: More specific domains take precendence over less specific domains, so: --server=/google.com/1.2.3.4 --server=/www.google.com/2.3.4.5 will send queries for *.google.com to 1.2.3.4, except *www.google.com, which will go to 2.3.4.5 this domain name with all the sub-domains is supposed to be forward to my NS server. Everything works (SOA, NS, MX, CNAME, TXT, SRV etc.) except for A-record: # nslookup -type=a mydomain1.com Server: 192.168.1.100 Address: 192.168.1.100#53 *** Can't find mydomain1.com: No answer 192.168.1.100 - IP address of my router (dnsmasq) However, I can get the answer for the TXT-record query: # nslookup -type=txt mydomain1.com Server: 192.168.1.100 Address: 192.168.1.100#53 mydomain1.com text = "v=spf1 include:mydomain1.com -all" When I just specify the local IP of my NS server (direct access to the server without using dnsmasq) then the results are: # nslookup -type=a mydomain1.com 192.168.1.1 Server: 192.168.1.1 Address: 192.168.1.1#53 Name: mydomain1.com Address: 192.168.1.1 There is a similar situation with the MX-record: C:\>nslookup -type=mx mydomain1.com Server: router.lan Address: 192.168.1.100 mydomain1.com MX preference = 10, mail exchanger = mail.mydomain1.com mydomain1.com nameserver = ns.mydomain1.com mail.mydomain1.com internet address = 192.168.1.1 ns.mydomain1.com internet address = 192.168.1.1 C:\>nslookup -type=a mail.mydomain1.com Server: router.lan Address: 192.168.1.100 *** No address (A) records available for mail.mydomain1.com This is a dig result: # dig +nocmd mydomain1.com any +multiline +noall +answer mydomain1.com. 86400 IN SOA ns.mydomain1.com. hostmaster.mydomain1.com. ( 121204007 ; serial 28800 ; refresh (8 hours) 7200 ; retry (2 hours) 604800 ; expire (1 week) 3600 ; minimum (1 hour) ) mydomain1.com. 86400 IN NS ns.mydomain1.com. mydomain1.com. 86400 IN A 192.168.1.1 mydomain1.com. 604800 IN MX 10 mail.mydomain1.com. mydomain1.com. 3600 IN TXT "v=spf1 include:mydomain1.com -all" When I try to ping: # ping mydomain1.com ping: cannot resolve mydomain1.com: Unknown host Is it a bug of dnsmasq 2.59? How to manage this problem?

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• What's the meaning of logging in as "[email protected]:something"

  - by Harvey Kwok

  My Windows 2008 R2 machine is joined to a domain. In the logon screen, if I type in "[email protected]:something" as the username, I can still logon properly, what's the meaning of ":something" appended at the end? I can even see the current user is displayed as "[email protected]:something" in the switch user screen. Is it a feature in Windows? Or is it just a bug? If it is a feature, what's the difference between logging in as "username@mydomain.com" and logging in as "[email protected]:something"? Note that I tried different combinations like "mydomain\username:something" and "mydomain.com:something\username". None of them work except "[email protected]:something".

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• How do I rewrite *.example.com to www.example.com?

  - by Lekensteyn

  In my network, I've some Ubuntu machines which need to download files from nl.archive.ubuntu.com. Since it's quite a waste of time to download everything multiple times, I've setup a squid proxy for caching the data. Another use for this proxy was rewriting requests for archive.ubuntu.com or *.archive.ubuntu.com to nl.archive.ubuntu.com because this mirror is faster than the US mirrors. This has worked quite well, but after a recent install of my caching machine, the configuration was lost. I remember having a separate perl program for handling this rewrite. How do I setup such a squid proxy which rewrites the host *.example.com to www.example.com and cache the result of the latter?

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• Can't upgrade ubuntu 9.xx to 12.04

  - by andrej spyk

  I can't upgrade old Ubuntu 9.10 to new, if I check for upgrade it says: Could not download all repository indexes *Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/main/binary-i386/Packages 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/restricted/binary-i386/Packages 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/main/source/Sources 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/restricted/source/Sources 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/main/binary-i386/Packages 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/restricted/binary-i386/Packages 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/main/source/Sources 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/universe/binary-i386/Packages 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/universe/source/Sources 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/restricted/source/Sources 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/universe/binary-i386/Packages 404 Not Found Failed to fetch http://cz.archive.ubuntu.com/ubuntu/dists/jaunty/universe/source/Sources 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/multiverse/binary-i386/Packages 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/multiverse/binary-i386/Packages 404 Not Found Failed to fetch tp://cz.archive.ubuntu.com/ubuntu/dists/jaunty/multiverse/source/Sources 404 Not Found Failed to fetch htp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/main/binary-i386/Packages 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/restricted/binary-i386/Packages 404 Not Found Failed to fetch ttp://security.ubuntu.com/ubuntu/dists/jaunty-security/multiverse/source/Sources 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/main/source/Sources 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/restricted/source/Sources 404 Not Found Failed to fetch http://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/universe/binary-i386/Packages 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/universe/source/Sources 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/multiverse/binary-i386/Packages 404 Not Found Failed to fetch ttp://cz.archive.ubuntu.com/ubuntu/dists/jaunty-updates/multiverse/source/Sources 404 Not Found Some index files failed to download, they have been ignored, or old ones used instead.* How I can upgrade if I can't burn new CD?

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• Google+ Platform Office Hours for February 8th 2012

  Google+ Platform Office Hours for February 8th 2012 This week's office hours were hosted by Jenny Murphy, Jonathan Beri and Wolff Dobson. Several developers from the Google+ developer community joined us. We spent the session responding to your questions and comments about the Google+ platform. Find the full show notes and discuss this session in our support forum: groups.google.com Learn more about our office hours on Google Developers: developers.google.com From: GoogleDevelopers Views: 4507 36 ratings Time: 47:50 More in Science & Technology

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• SQLAuthority News – Monthly list of Puzzles and Solutions on SQLAuthority.com

  - by pinaldave

  This month has been very interesting month for SQLAuthority.com we had multiple and various puzzles which everybody participated and lots of interesting conversation which we have shared. Let us start in latest puzzles and continue going down. There are few answers also posted on facebook as well. SQL SERVER – Puzzle Involving NULL – Resolve – Error – Operand data type void type is invalid for sum operator This puzzle involves NULL and throws an error. The challenge is to resolve the error. There are multiple ways to resolve this error. Readers has contributed various methods. Few of them even have supplied the answer why this error is showing up. NULL are very important part of the database and if one of the column has NULL the result can be totally different than the one expected. SQL SERVER – T-SQL Scripts to Find Maximum between Two Numbers I modified script provided by friend to find greatest number between two number. My script has small bug in it. However, lots of readers have suggested better scripts. Madhivanan has written blog post on the subject over here. SQL SERVER – BI Quiz Hint – Performance Tuning Cubes – Hints This quiz is hosted on my friend Jacob‘s site. I have written many hints how one can tune cubes. Now one can take part here and win exciting prizes. SQL SERVER – Solution – Generating Zero Without using Any Numbers in T-SQL Madhivanan has asked very interesting question on his blog about How to Generate Zero without using Any Numbers in T-SQL. He has demonstrated various methods how one can generate Zero. I asked the same question on blog and got many interesting answers which I have shared. SQL SERVER – Solution – Puzzle – Statistics are not Updated but are Created Once I have to accept that this was most difficult puzzle. In this puzzle I have asked even though settings are correct, why statistics of the tables are not getting updated. In this puzzle one is tested with various concepts 1) Indexes, 2) Statistics, 3) database settings etc. There are multiple ways of solving this puzzles. It was interesting as many took interest but only few got it right. SQL SERVER – Question to You – When to use Function and When to use Stored Procedure This is rather straight forward question and not the typical puzzle. The answers from readers are great however, still there is chance of more detailed answers. SQL SERVER – Selecting Domain from Email Address I wrote on selecting domains from email addresses. Madhivanan makes puzzle out of a simple question. He wrote a follow-up post over here. In his post he writes various way how one can find email addresses from list of domains. Well, this is not a puzzle but amazing Guest Post by Feodor Georgiev who has written on subject Job Interviewing the Right Way (and for the Right Reasons). An article which everyone should read. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, Readers Contribution, Readers Question, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQLServer, T SQL, Technology

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• App Engine Hangout - chat with an App Engine Software Engineer in Test

  App Engine Hangout - chat with an App Engine Software Engineer in Test We'll be chatting with Robert Schuppenies, who is an App Engine Software Engineer in Test. He'll describe a bit about what he does, and talk about/demo some App Engine test frameworks, like the testbed module, code.google.com and code.google.com From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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• Google I/O Sandbox Case Study: Angry Birds

  Google I/O Sandbox Case Study: Angry Birds We interviewed Rovio, the makers of Angry Birds, at the Google I/O Sandbox on May 11, 2011 and they explained to us the benefits of building on Chrome. Angry Birds, one of the most popular games for mobile devices, is now available on Chrome! For more information about developing on Chrome, visit: code.google.com For more information on Rovio, visit: www.rovio.com From: GoogleDevelopers Views: 19 0 ratings Time: 01:14 More in Science & Technology

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• Google I/O Sandbox Case Study: CardinalCommerce

  Google I/O Sandbox Case Study: CardinalCommerce We interviewed CardinalCommerce at the Google I/O Sandbox on May 10, 2011. They explained to us the benefits of integrating with Google Checkout. CardinalCommerce enables authenticated payments and alternative payment brands and is working with Google to create Google Mobile Wallet. For more information about developing with Google Commerce, visit: code.google.com For more information on CardinalCommerce, visit: www.cardinalcommerce.com From: GoogleDevelopers Views: 611 16 ratings Time: 02:19 More in Science & Technology

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• Google I/O Sandbox Case Study: HistoryPin

  Google I/O Sandbox Case Study: HistoryPin We interviewed HistoryPin at the Google I/O Sandbox on May 10, 2011 and they explained to their new technology and the benefits of integrating with Google Maps. HistoryPin lets you upload historical photos of places onto their respective points on Google Maps, enabling users to see what cities looked like at different points in time. For more information about developing on Google Maps visit: code.google.com For more information on HistoryPin, visit: www.historypin.com From: GoogleDevelopers Views: 90 0 ratings Time: 01:28 More in Science & Technology

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• Apps Script Office Hours - September 13, 2012

  Apps Script Office Hours - September 13, 2012 In this week's episode of Google Apps Script office hours, Jan and Arun: - Introduce the Google Apps Script app that was recently published in the Chrome Web Store: chrome.google.com - Answer a variety of questions from the Google Moderator. - Answer live questions about UiApp, triggers, ScriptDb, and other topics. To find out when the next office hours will be held, visit developers.google.com From: GoogleDevelopers Views: 221 7 ratings Time: 17:26 More in Science & Technology

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• Google I/O Sandbox Case Study: WebFilings

  Google I/O Sandbox Case Study: WebFilings We interviewed WebFilings at the Google I/O Sandbox on May 10, 2011 and they explained to us the benefits of using App Engine to build their website. WebFilings provides a secure, cloud-based end-to-end financial reporting solution for SEC reporting companies. For more information on App Engine Developers, visit: code.google.com For more information on WebFilings, visit: www.webfilings.com From: GoogleDevelopers Views: 29 1 ratings Time: 02:31 More in Science & Technology

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• Content API for Shopping - Fireside Chat with Zazzle

  Content API for Shopping - Fireside Chat with Zazzle We'll be chatting with Zazzle engineer Andrew Lamonica about the way they use the Content API for Shopping and we'll be introducing the newest member of the Shopping team here at Google. Links from video: Demo Page: google-content-api-tools.appspot.com Debug Dashboard: googlecommerce.blogspot.com From: GoogleDevelopers Views: 264 7 ratings Time: 41:36 More in Science & Technology

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• Google I/O Sandbox Case Study: DayZipping

  Google I/O Sandbox Case Study: DayZipping We interviewed DayZipping at the Google I/O Sandbox on May 10, 2011. They explained to us the benefits of integrating with Google Maps. DayZipping is a website where users can find and share day trips for a variety of popular destinations. For more information about developing on Google Maps, visit: code.google.com For more information on DayZipping, visit: www.dayzipping.com From: GoogleDevelopers Views: 33 0 ratings Time: 02:09 More in Science & Technology

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• Google I/O Sandbox Case Study: GoAnimate

  Google I/O Sandbox Case Study: GoAnimate We interviewed GoAnimate at the Google I/O Sandbox on May 10, 2011 and they explained to us the benefits of using partnering with YouTube. GoAnimate is an video creation platform that lets users easily create animated videos and publish them on YouTube. For more information on developing on YouTube, visit: code.google.com For more information on GoAnimate, visit: goanimate.com From: GoogleDevelopers Views: 33 0 ratings Time: 02:17 More in Science & Technology

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