Hi,
I have the exact same problem described in this thread:
http://www.empirisoft.com/support/showthread.php?t=2383

When DirectRT takes over I get the following message in all computers:

Data file ......... csv already exists. Data from this session will replace existing data. Is this what you want?

Previously, when this kind of error message appeared, it meant that we had accidentally entered the same participant number twice. Now it shows the same message systematically no matter the participant number we enter and on all computers.

I would appriciate your help with this,
Thanks,
Eden