We created a script for a new monitor. When trying to upload the script to the monitor in the CA App Synthetic Monitor portal, it did not complete successfully. Once clicking on the "Continue" button, the "Validating script" popup window would appear as usual, but disappear shortly after, without any further error message or progress.
The root cause is due to an incompatible JMeter version used to create the script. CA ASM 8.7 currently does not support this version. The highest JMeter version supported by CA ASM 8.7 is 2.13.
Re-save the script to JMeter 2.13 compatible, before uploading to CA ASM 8.7
Support for JMeter 3.x will be considered in future CA ASM release.