Bill,

>>Can anyone tell me if timer events are 'modal'?

I have had a similar problem with a timer created as a _Screen object, in a project where all forms use private DataSessions. Although the timer should be in the default global DataSession, in fact it appears to be in DataSessionID = 1 DataSession, which varies depending on which forms are opened when.

The advice I have been given over in Compuserve was to either open any necessary tables in the Timer event using USE ... AGAIN SHARED or use ASESSIONS() and AUSED() to determine which DataSession already has the required tables open and SET DATASESSION to that DataSession.

I am opting for the USE ... AGAIN SHARED approach, but still need to do a lot of testing to determine if it will be robust.

David