In February, we came across an unmapped problem in our environment. In short, our experts identified that the problem occurred because there was a specific CICS transaction, which was started in duplicate. And our environment did not warn that in any of the tools because it was not mapped.
There is a monitoring to identify a drop in this transaction, but we had not anticipated this, because the partner did not inform us that this was a problem for the operation of the service.
This transaction x must be active for the service to work.