Custom process Instruction for co-product

Hello everyone,

I have a material BOM in which one of the components has negetive value and hence is a co-product.

Now i have a process order for this material,in which if i go inside operations and then by selecting a phase if i go for Process Instructions

there exists a Process Instruction category ZCONF in which i have created PI custom characteristics fot teh co-product.

Now the problem is I want to fetch the values from the BOm for the co-product when the process order is released.I am not able to find an exit for this.

Kindly help.

Regards,

Yashi Trivedi