How To Fix MMPUR_SPROC018 - You cannot combine the selected items.

MMPUR_SPROC018 - Overview

• Message type: E = Error

• Message class: MMPUR_SPROC - Message class for service procurement

• Message number: 018

• Message text: You cannot combine the selected items.

What causes this issue?

The following combinations of item categories and product type groups
are not possible:
item category E ('enhanced limit') + item category B ('limit') or D
('service')
product type group 2 ('service') + item category B ('limit') or D
('service')
item category B ('limit') + item category E ('enhanced limit') or
product type group 2 ('service')
item category D ('service') + item category E ('enhanced limit') or
product type group 2 ('service')

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

The purchase order cannot be saved.

How to fix this error?

Choose a valid combination or create a new purchase order for one of the
items causing the error.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MMPUR_SPROC018 - You cannot combine the selected items. ?

  The SAP error message MMPUR_SPROC018, which states "You cannot combine the selected items," typically occurs in the context of procurement processes, particularly when trying to create or process purchase orders, purchase requisitions, or similar documents. This error indicates that the system has identified that the items you are trying to combine in a single transaction cannot be processed together due to certain constraints.
  Causes:
  
  Different Item Categories: The items may belong to different categories (e.g., stock items vs. non-stock items) that cannot be combined in a single document.
  Different Vendors: If the items are sourced from different vendors, the system may restrict combining them in one purchase order.
  Different Purchasing Organizations: Items associated with different purchasing organizations may not be allowed to be combined.
  Different Material Types: Items with different material types (e.g., raw materials vs. finished goods) may not be combinable.
  Different Valuation Classes: Items with different valuation classes may also trigger this error.
  Contractual or