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MS Project SP3 Problem

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After upgrading Microsoft Project to Service Pack 3 from Service Pact 2, some files that were created in SP2 will not open. We get the following error:

An unexpected error occured during command execution.

Try the following:

Verify that all argument names and values are correct and are of correct type.

You may have run out of memory. To free up available memory, close programs, projects, or windows that your aren't using.

The files open in Project 2003 SP2 and Project 2007 with no problems. If I save the file as a Project 98 file, then project 2003 SP3 can open it. There are no passwords set on the files.
Does anyone know what the problem is?

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by thumbsup2

Office 2003 SP3 initiated some new security protocols which have effected several things, including some HP network printers among other things.

Check the documentation for Project 2003 SP3 to see what changes are not backwards compatible. A couple of things the article mentions specifically is that "Some COM components with unusual characteristics may not function as expected. For more information, see Microsoft Knowledge Base Article 938814" ----AND---- "Project 2003 can no longer open or save certain file formats. For more information, see Microsoft Knowledge Base Article 941466".

http://www.microsoft.com/downloads/details.aspx?FamilyId=FCC0627B-2C58-4A70-B808-4D7A1B26535E&displaylang=en

by dterlecki

OK here is what your looking for. Update KB948962 which is also included in project SP3 can cause the error you are getting. Microsft does have a hotfix for this which I have tested. Unfortunately it is not a simple process getting this from Microsoft as it took me two days and many different support people. I wish someone had posted this earlier but here it is for the rest of you.

http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=951883&kbln=en-us

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