I'm trying to read a PDB file into a C# application. When I call loadDataFromPdb or loadAndValidateDataFromPdb with a file that I know exists, I get an HRESULT of 0x806D0005. Unfortunately, I have no idea what that means. I have the list of possible results [here](http://msdn.microsoft.com/en-us/library/2008hf0e(v=VS.80).aspx) but I'm afraid I can't conclusively determine the problem.

Does anybody know what I'm doing wrong? Or at least a method of checking what that corresponds to?

Exception: System.Runtime.InteropServices.COMException (0x806D0005): Exception from HRESULT: 0x806D0005 at Dia2Lib.DiaSourceClass.loadDataFromPdb(String pdbPath)

Code Sample:

public static void LoadSymbolsForModule(uint baseAddress, uint size, uint timeStamp, DM_PDB_SIGNATURE signature)
{
    IDiaDataSource m_source = new DiaSourceClass();
    //m_source.loadAndValidateDataFromPdb(signature.path, ref signature.guid, 0, signature.age);
    m_source.loadDataFromPdb(signature.path);
    IDiaSession m_session;
    m_source.openSession(out m_session);
    m_session.loadAddress = baseAddress;
    modules.Add(new Module(baseAddress, size, m_session));
}

Thanks in advance, guys. This problem has been killing me all day.