==>> The FParams are not assigned. There are two

> params, but they have no values, in contrast to
> one masterfield, where a value is assigned.
> Where or when are these FParams assigned?

I cannot help much directly, I dont use the TIBO* stuff myself. I
suggest that you try to recreate the problem in a simple application
(preferably based on one of the sample application databases such as
employee.gdb or contact.gdb) and send Jason a demo of the problem.

--
Geoff Worboys
Telesis Computing