>>>>>It works as expected for me!
>>>>
>>>>I assume you are using VFP 9. do you have SP 1 installed?
>>>
>>>Yes (of course...)! Maybe someone else can try it, and report the result?
>>
>>FWIW, I get the error with both VFP9 and VFP9SP1 ("Partition:Expression evaluated to an illegal value")
>>Regards,
>>Viv
>
>I have tried a lot of times now, without any errors. I have the maximum design area set to (none), maybe that's relevant?

Don't know :-{
Also FWIW, setting the SplitBar property first prevents the Partition property being set to 100 (illegal value)......