Apparently, I have been using BAPI_ACC_GL_POSTING_POST and implement user exit (CMOD) ACBAPI01, component EXIT_SAPLACC4_001 to Park G/L Document. Everything looks fine so far.
However, business consultant has commented that the Validation Rule (Transaction Code OB28) does not trigger when executing the above BAPI. Normally, when user execute tcode F-02 to create Park Document, it will trigger Validation Rule (OB28).
Can anyone shed some lights of why Validation Rule is not trigger when using the above BAPI? Is it because the BAPI is executed without online screen, and thus no Validation Rule is fired, or I have missed out some steps?
Thanks and best regards,