Cash Journal - Internal order mandatory

Hi,

We have setup a field status variant (ie) Z001, and made internal order as mandatory. when i post any document through F-02, the system shows that it is mandatory.

but when i post a document for the same GL using FBCJ without internal order also the document is posted. How to make the internal order mandatroy for the transcation FBCJ also.

Regards

Vasantha