Simple steps to disable a TCODE from user access:
1) Execute TCODE: SM01
2) Enter the TCODE to be lock in the text box and press the "ENTER" key
3) Click in the TCODE text box and click the "Lock" button
4) A tick will be shown on the check box indicating the TCODE been locked
5) Sample error when the TCODE been execute.
6) Perform the similar task to unlock the TCODE later.
