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In SharePoint 2010, 6644 refers to error related to Event Receiver. In MOSS 2007, is this the same? MSDN doesn't specified what type of error this event id refers to.

In the event log, I got the following, multiple times

Event Type: Error
Event Source:   Windows SharePoint Services 3
Event Category: General 
Event ID:   6644
Date:       12/7/2012
Time:       4:10:58 AM
User:       N/A
Computer:   xxxxxxxxxxxx
Event manager error: Could not load file or 
assembly 'xxxxxxxx.xxxxxxxxxxxxx, Version=, 
Culture=neutral, PublicKeyToken=123456789abcdef' 
or one of its dependencies. The system cannot 
find the file specified.

For more information, see Help and Support Center 
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it it a custom event receiver I think? are all the dlls in your GAC? Maybe have you release a feature with a event receiver that looking for a dll that you have no more? – Salvatore Di Fazio Feb 4 '13 at 13:33
Well, the deployment of the dll went from 1.x to 3.x, skipping 2.x. I'm not sure if this type of error comes from event receivers calling for particular version of dll – OnesimusUnbound Feb 4 '13 at 14:44
IMHO you can have this problem for two at least: a) the xml that map your event to your dll is wrog; or b) you haven't the dll deployed on your GAC. What about the dev environment? – Salvatore Di Fazio Feb 4 '13 at 14:48
3.x of the dll is deployed. What I wondered is why the some process (event receivers?) is looking for 2.x which was never deployed. Anyway, how do i check the deployed xml that maps to the dll? – OnesimusUnbound Feb 4 '13 at 15:09
check on the feature directory – Salvatore Di Fazio Feb 4 '13 at 15:23

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