If you need in SAP to prohibit the transfer of requests from the DEV system further along the transport landscape, you can create a file for this:
- /usr/sap/trans/bin/T_OFF.ALL to block all systems or
- /usr/sap/trans/bin/T_OFF.ER2 to block to a specific system.
The contents of the file will be displayed during the attempt (unsuccessful) to release the request in the development system.