The job concurrency level must be an integer that is greater than 0. For example, when I include any negative values in the concurrency level for a VDPCache job, it will throw an error like below:
> 'Incorrect value for configuration parameter 'jobConcurrencyLevel' (must be an integer > 0)'
You can refer to the section[ VDPCache Extraction Section](https://community.denodo.com/docs/html/browse/8.0/en/scheduler/administration/creating_and_scheduling_jobs/configuring_new_jobs/vdpcache_extraction_section#vdpcache-extraction-section) of the Scheduler Administration Guide for more information.
If you still need help and you have a valid support user account, please open a new support case at the [Denodo Support site](https://support.denodo.com/) so that the support team can assist you.
Hope this helps!