Why are we unable to confirm Purchase orders ?

Cause:
System will not allow to confirm Purchase Order with new division, if the division is not defined /mapped in the masters. System will show ‘VTFLTITNTM’, ‘ Invalid item type’, ‘Item Type is not Defined in Master’ or ‘Data application error ‘.
Suggestions:
Users will have select the new division in item account determination master and map it with the Purchase account. Once the new division is mapped then users should go ahead and confirm the Purchase order.
For Item Account Determination master, go to Finance->Finance Setup-> Masters->Item Account Determination.