RPT is unable to execute a schedule because one of the ports(%1) it uses to communicate with the agents has been taken by another RPT(or other server) process. Ensure only one RPT instance is running.
Typically, this error occurs
when a server process on the workbench computer is listening on the same port that
Rational® Performance
Tester requires. This
error can also occur when two instances of
Rational® Performance
Tester run on the same
workbench.
Identify and stop the other
process or service on the workbench that is using the ports that
Rational® Performance
Tester requires.
Restart
Rational® Performance
Tester. You
can also change the ports that
Rational® Performance
Tester uses by configuring the workbench and all agent computers. To change
the ports, click Window > Preferences > Test > Server, and click Preferences >
Test > Performance Test Reports > Web Reports.