I am running Robot V 2003.06.00.436.000. At times when Robot clocks and I end the session using Task Manager. I do not receive any errors, but I can not re-load Robot. I have to re-boot to get Robot to run.
As rightly said by Bryan, re-booting the system is not required. You can just kill the process.
Also, there is new version is available, which you should try out although this is not the correct way of troubleshooting. The newer version is 2003.06.13 and with the Rational Support it is 2003.06.15 (although it is not generally available).
Hope this helps.
A highly advanced bug is indistinguishable from a feature.