We have followed below mentioned steps but q2.rdb is not created again.
Please help to clear some space in /opt.
1) Check the <nimsoft>\robot\q1.rdb and q2.rdb files. If q2.rdb is small (~1KB) and q1.rdb is continuing to grow, there's probably corrupt data in q2.rdb that's causing QoS to queue on the spooler.
2) Stop the robot.
3) Move q2.rdb to a temp folder
4) Restart the robot.
This will allow the robot to create a new q2.rdb file which should then allow q1.rdb to begin to flush. An analysis of the archived q2.rdb may show corrupt data via illegal characters which was disrupting the normal data flow.
UIM 20.4
Robot 9.33
Follow the below step:-
== Login to robot M/c and stop the nimsoft watcher services
== Delete the contained of nischache folder
== Take the backup and delete the q1.rdb and q2.rdb
== Start the Nimsoft watcher Services
== Upgrade the robot to 9.36