How To Fix NI008 - Purch. doc. type & (doc. cat. &) not allowed (Please check your input)

SAP Error Message - Details

• Message type: E = Error

• Message class: NI - Document index processing

• Message number: 008

• Message text: Purch. doc. type & (doc. cat. &) not allowed (Please check your input)

What causes this issue?

Purchasing document type &V1& belongs to category &V2& (&V3&). However,
the function you requested can only be performed for document types of
category

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

'F' - Purchase order, and
'L' - Scheduling agreement

System Response

The function is not possible for document category &V2& (&V3&).
Documents belonging to document type &V1& of category &V2& (&V3&) will
therefore be neither selected nor processed.

How to fix this error?

Please check your input. Use the F4 help to view the permissible
values.
If you perform the function anyway, the documents belonging to document
type &V1&, category &V2& (&V3&) will neither be selected nor processed.
If - in contrast to the standard system - document type &V1& is also
allowed for category "F" (purchase order) or "L" (scheduling agreement)
in your system, the relevant documents will, of course, be processed.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message NI008 - Purch. doc. type & (doc. cat. &) not allowed (Please check your input) ?

  The SAP error message NI008 indicates that there is an issue with the purchase document type and document category you are trying to use in your transaction. This error typically occurs when the combination of the purchase document type and document category is not allowed or is not configured correctly in the system.
  Cause:
  
  Incorrect Document Type: The purchase document type you are trying to use may not be valid for the specific document category you are working with.
  Configuration Issues: The configuration settings in the SAP system may not allow the combination of the specified purchase document type and document category.
  Missing Authorizations: The user may not have the necessary authorizations to create or process the specified document type.
  Customizations: If there are customizations in the system, they may restrict the use of certain document types with specific categories.
  
  Solution:
  
  Check Document Type and Category: Verify that the purchase document type and document category you are using are valid and allowed in your SAP configuration.
  Configuration Settings: 
  
  Go to the configuration settings in SAP (Transaction code SPRO).
  Navigate to Materials Management > Purchasing > Purchase Order > Define Document Types.
  Check the settings for the document type and ensure it is configured correctly for the intended use.
  
  
  User Authorizations: Ensure that the user has the necessary authorizations to create or process the document type. This can be checked with your SAP security team.
  Consult Documentation: Review any relevant documentation or guidelines provided by your organization regarding the use of purchase document types and categories.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for further assistance, especially if there are customizations involved.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like ME21N (Create Purchase Order) or ME22N (Change Purchase Order) to test the document type.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Training and Documentation: Ensure that users are trained on the correct use of document types and categories in SAP to prevent future occurrences of this error.
  
  By following these steps, you should be able to identify the cause of the NI008 error and implement the necessary solutions to resolve it.