Hi.
Thanks to Svein and Norman.

I am using D6 P2, Ibo4.0 Hc and Win98SE.

The problem reside in a simple master detail link.

If I scroll in a grid suddenly all is hung and display " Parameter is
Incorrect ".

I cannot see WHERE ( in which line ) fault because of hanging.

In Ibo4 Ha there was no problem at all.


Thanks
Tony