David,
Thanks for your suggestions. But I could not see the resource problems, because the application is freezing the whole screen. But this may be a point: It must be a resource problem, maybe in connection with Windows 98 and Reports.
I use HP LaserJet 5/5 - Enhanced as Printer Driver and about 500 Fonts or so.
RAM is 64 MB, VFP version 6.0.
Tomorrow or so I will install Norton Utilities or Crash Guard (we have it somewhere), hopefully I get some more information through this.
Is it possible to find corruptions in forms or reports?
I have to make 20 more reports or even more, so if I don't find the source of this problem, I have to use another Report tool.
Do you have experience with other Report tools for VFP 6.0?

Thanks for your time