Hi Kanstantin,
We still have not been able to figure this issue out. Now it seems to work for 1 punchout catalog supplier and not another. Seems that UNSPSC code ABC comes back for punchout catalog supplier A, but not for supplier B. My developer has confirmed in debug that he can see the UNSPSC code trying to come back and then in /sapsrm/cl_pdo_bo_sc===========cm05t changes the it to what is assigned in extended attributes.
Thanks,
Jeff Miller