Problem:
While running the test in Loadrunner controller,"An unsupported operation was attempted" message occurred after clicking on error message and also output message box is empty.
Reason:
This error occurs due to the corruption of OLE (Object linking and embedding) file related to Input Output in LR installation.
Solution:
1. Close all the LR related components in the machine.
2. Register the service. Please run the below command
"regsvr32 C:\Program Files\HP\LoadRunner\bin\outputuiproj1.ocx"
3. Rename the file "outputuiproj1.ocx" to "output~1.ocx"
4. Restart the machine.
Now your problem is solved.