BAPI for COWBPACK and COWBHUWE

Hi Everybody,

I'm having the same dilemma, I would like to use external numbering with COWBPACK, but it seems to be imposible in standard SAP. Also I need to find a BAPI or function module for HU transactions COWBPACK and COWBHUWE

¿Could you find a BAPI for COWBPACK and COWBHUWE?

Thanks in advance for any kind of help.

Best Regards,

Favio Del Castillo.