>Hmm.. Just a thought here. Is your app explicitly passing a workstation ID to the Server?
>
>Never worked with Citrix. But, we experienced something similar on a Novell system. The problem was not VFP, but rather with the way Novell handled file locking down at the OS layer(even though you call it from VFP, the server OS can also lock files/records).
>
>You have to lock records eventually (as in an record update). If the lock is not released (same effect if the release is delayed by some few seconds), this perhaps would trigger the error message your users receive.
>
>In our case, the resolution was for us to do a better job of passing a unique workstation ID's to the server. The OS was then more diligent about releasing locks; and we lived happily ever after.
>
>- Don Lowrey

Could you explain what you exactly did ?