SAP B1 881 - an unhandled win32 exception occurred in upgrade.exe [3772]

Hi,

I'm trying to upgrade a db from version 800238 (2007 SP01 PL13) to version 881312 (881 PL04) and the upgrade allways fail giving the error «an unhandled win32 exception occurred in upgrade.exe » and it opens the debugger.

If i debug it, it shows the message «Unhandled exception at 0x103bfba3 in Upgrade.exe: 0xC0000005: Access violation reading location 0xfffffbc4.»

I've upgraded other dbs from other versions.

What can be the problem?

Best Regards

Paulo Serol