Navision 4 SP1: Zup File problems: Message: "There is something wrong with the file c:\documents and settings\..."

Hello,

One of our customers reports following message:

There is something wrong with the file c:\documents and settings…\fin.zup. To continue, you must delete or rename the file. The message often appears from different users in standard Navision objects and in Navision Partner objects. E.g. in a customer card, go to the next record. This cannot be simulated. I know that a large file can be responsible for a corrupt ZUP-file. What other known issues can corrupt the ZUP file?

Please let me know if you need more information to help to solve this problem.

Thanks a lot for your help.

Patrick

Not that this is an answer to that question but why not put them on SP3 will all the bug fixes?