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Suppose, if you have uninstalled ThingWorx Flow successfully with appropriate steps. And, tried re-installing which is failing with below error in the flow installation logs,
" FATAL: SystemCallError: windows_service[RabbitMQ] (orchestration::rabbitmq line 120) had an error: SystemCallError: The specified service does not exist as an installed service. - OpenService: The specified service does not exist as an installed service."
This is due to the registry problem.
To resolve this, need to delete the registry key. Following steps are need to be performed:
Here is the article link on this subject: https://www.ptc.com/en/support/article/CS328600
Thanks,
Vibhuti Angne