then what is the problem if you keep the GL master in automatic posting mode only ? with this feature you will be able to ensure that all automated programs like F110, FF67 etc will run but it will not allow user to post manually through F-02 or F-58 etc.
If I advise you any validation that GL postng only if Tcode is FF67 then system may cause problem when you run APP or other automated programs. otherwise you will have to take care of all these programs when you build the validation rule . Pls take a call accordingly.
best regds
Subha
