Enqueue Functions as of S/4HANA Release 1809

Dear Experts,

We want to setup a system environment for training purposes only. To accomplish this, we want to disable the enqueue process for the duration while the trainees are performing their exercises.

We used a Z-report with following code snippets for this:

* Disable the enqueue process
CALL 'C_ENQUEUE' ID 'OPCODE' FIELD 'F'.

* Enable the enqueue process
CALL 'C_ENQUEUE' ID 'OPCODE' FIELD 'T'.

Our new environment runs on SAP S/4HANA 1809. Here the above mentioned code snippets do not work anymore. sy-subrc equals 4 after calling the system function. In 1610 it was working. I did not test it in 1709.

Does anyone have s solution on how to temporarily disable the enqueue process either by suplementing the above code snippets or with a completely different way?

Thx for any suggestions.

BR

Benjamin