An execution variable is used but defined in a RQM Manual script. How it is posible?

Hello,

I’m looking at a RQM 6.0.2 user instance.

I found out a Manual script defined in that way:

Several steps reference an execution variable but the execution variable does not exist.
It is not defined as a “Project Execution Variable”, not as a “Test Case Execution Variable” and not in the Test script itself.
The Test script history shows that a step was updated by replacing some text by the execution variable but I didn’t see any add operation for this variable.

As a result, the variable is not updated at the execution time.

Is someone already encountered this problem?

The easy workaround is create the variable but I’m interesting how the problem can be created.

Thank you in adavnce
Pascal Jean