Попробуй поставить после каждого ретрива
do while Yield ( ); loop;

Иногда помогает. Гость.

Usage
Include Yield within a loop so that other processes can happen. For example, use Yield to allow end users to interrupt a loop. By yielding control, you allow the user time to click on a cancel button in another window. Then code in the loop can check whether a global variable's status has changed. You can also use Yield in a loop in which you are waiting for something to finish so that other processing can take place, in either your or some other application.
Using other applications while retrieving data Although the user can't do other activities in a PowerBuilder application while retrieving data, you can allow them to use other applications on their system. Put Yield in the RetrieveRow event so that other applications can run during the retrieval.