While executing the load test with J2EE Diagnostics enabled, user always receives the error "Failed to start J2EE/.NET Diagnostics. There are no selected probes" though the diagnostics probes selected. Later we found that the Diagnostics probe's selected in the design page are not getting saved to the backend and hence we receive this error.
Please refer to the article for the patch fixing this problem.
Note: This problem happens on Performance Center 12.01 Patch 2 Only.