Had an issue at a customer where Word 2010 was not properly called from Navision when they tried to generate multiple Word documents from Navision.
The following error was thrown to the customer (Was not able to get an English translation)

Generating a single Word document was no problem.
Environment:
- Windows 2008 SP2
- RES Powerfuse 2010 9.0.5.0 SR5
- Navision 2009 SP1 6.00.31793
First turned off RES Powerfuse shell, when the RES Powerfuse shell was not used, the issue did not occur.
What we did see when RES Powerfuse shell was turned off, was that a lot of instances of winword.exe were resident in processes on the Terminal Server.
Navision support first pointed to RES, but after a while and a support case with Microsoft, KB2553912 emerged and the issue was solved. Word is now properly closed and the user does not get the error message anymore.
Navision support first pointed to RES, but after a while and a support case with Microsoft, KB2553912 emerged and the issue was solved. Word is now properly closed and the user does not get the error message anymore.