When creating a PO in the buyer workbench the company segment is not visible, in this case we purchase using two different company segments (800, 802).
If you create the PO in standard purchasing, it works fine. if I go back an look at the po that was just created using the buyer workbench, the company segment is missing, but the rest of the account code shows.
Please check the following profile options
MO: Security Profile : Must be nulled out at user, iprocurement responsiblity and at SITE LEVELS
MO: Operating Unit : Must be set a valid value at the iprocurement responsiblity level.
MO: Default Operating Unit : Must be set a valid value at the iprocurement responsiblity level/site level.
Note: (you may set the above profile at other responsibilities or application levels as desired)