production order cann't be settlement .
production order cann't be settlement .error message occurs as follow:
This message is issued if no document header (VBAK) can be found
(discrepancies in R/3) for a sales requirement single record.
In the initial sales order supply, the following error message appears
'Document xxxxxx not available' V1 302.
If an error occurs in initial data supply in APO, discrepancies have
occurred between the requirements and sales documents in R/3. This
discrepance can be corrected in R/3 using report SDRQCR21.