I have a Document Library A and a list B.

When a document added to A, an item is created in B with the Title = A.Url. Another workflow runs whenever a document is updated in A which makes a lookup: B.Title = A.Url, and changes another column in B in found item.

Item Change Workflow always gives "Error Occurred: List item is not found". I modified the workflow to send me an e-mail containing the new (but unchanged) A.Url. It sent me the exact string with the one already in list B.

Anyways, why it can't find the item when the two columns are equal?

Thanks in advance.

Edit

I literally hate Microsoft Sharepoint.