"Error: Your Crystal runtime engine has been downgraded to less than service pack 21 (SP21) and the application is expecting Crystal runtime engine SP21 or greater to be installed."
If you are getting the above message, please download and run the latest update (download the latest update --- do NOT download and run the full installer unless instructed to do so by Support).
It will fix the issue you're seeing, even if you believe you have that same version already installed. Download the updater and run it.
If you run the update, and it does NOT fix the issue, you need to MANUALLY fix the issue (by copying one file). It's all dependent on what version of the Crystal runtime engine you're running.
In the program files directory where you have Jeff-Net\Report Runner, you should have three additional folders. One says SP21ToSP25, one says
SP26OrLater, and the other SP20OrPrevious
. Copy the Report Runner Unified.exe FROM SP20OrPrevious
directory INTO the Report Runner directory (you'll be replacing the existing EXE).
For more information on this service pack issue, please see the release notes from 2018.300/2018.305
This KB article may also provide some additional information and assistance:https://help.jeff-net.com/knowledgebase/article/how-to-fix-a-catastrophic-error-when-trying-to-start-report-runner