Idoc trigerring with change pointer under conditions

Hello dear experts

Could you please tell me how can i trigger an outbound idoc using the change pointer ( RBDMIDOC program)?

I have to generate the ARTMAS outbound idoc ONLY when the material status which is the table MARA is set to a certain value.

I can manage to trigger the outbound idoc but i did not manage to restrict this triggering according to the value of the material status fields.

Thanks for all your answers.

Best Regards.

Yannick