Chapter ID check while doing MIGO

Hello All ,

I need to implement a check while creating MIGO.

While doing MIGO at header level there is a Excise Invoice tab , this TAB appears if we check Item OK check box and also the Material is Excisable.

Now my company's MM consultant want a check to implemented such that whenever user enters a value for Excise Invoice the system should check whether Chapter ID has been maintained for that Material or not.

I had check all MIGO related BADIs like MB_DOCUMENT_BADI , MB_CHECK_LINE_BADI but no use , reason being Excise Updation is carried out separately using FM J_1IEXGM_UPDATE_EXCISE.

So I tried to Implicitly Enhance the FM but it shows DUMP reason being its an UPDATE TASK FM.

Also tried to Implicitly Enhance the Tab Screen Excise Invoice's PAI ( SAPLJ1IEXGM , LJ1IEXGMPAI. ) but can't find any point to write my code.