Distribution channels deviate from each other.u00A0u00A0and/or 01 (reference)

Dear Guru

I have a problem when create the "Credit memo request"

in the sales order type " CR" , I'd maintain the " Reference mandatory = M",

That's mean every Credit memo must reference the billing document ,

But when I create the credit memo request , once fill up the billing document,

System have a error message:

"Distribution channels deviate from each other. and/or 01 (reference)

Message no. V2011

Diagnosis

The distribution channel in the reference document is not the same as the distribution channel in the target document.

Procedure

If you want to add to an existing document by referring to another document, select a reference document which has the same distribution channel as the target document.

If you want to create a document with reference, make sure you are using the correct distribution channel and document number.

Does anyone have the experience to solve it.

thanks.