How To Fix GRPG101 - Material &1 not allowed for WBS element &2

GRPG101 - Overview

• Message type: E = Error

• Message class: GRPG - Grouping/Pegging for Individual Project Planning

• Message number: 101

• Message text: Material &1 not allowed for WBS element &2

What causes this issue?

Material &V1& has been specified as being relevant for requirements
grouping, via its MRP group.
MRP ignores individual stocks for WBS element &V2&. Instead of this,
the material is planned in the stock of WBS element &v3&.

System Response

If the message is an error message, processing is not continued.

How to fix this error?

Check whether the material cannot be posted to the individual stock of
WBS element &V3&.
You can switch off this error message, by allowing individual stocks,
which are not taken into account in either MRP or availablity checks,
for WBS elements:

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

In Customizing for general controlling call up the work step
<DS:SIMG.SIMG_CFMENUORK3OBA5>Change message control</>.
Enter the application area GRPG and maintain the entry for message
number 101. If you do not enter an user, the changes are valid for all
users.

Error message extract from SAP system. Copyright SAP SE.

GRPG101 - Details

• The SAP error message GRPG101 indicates that a specific material (denoted as &1) is not allowed for a particular Work Breakdown Structure (WBS) element (denoted as &2). This error typically arises in the context of project management and controlling within SAP, particularly when trying to assign materials to a WBS element that has restrictions.
  
  Cause:
  
  Material Status: The material may have a status that prevents it from being used in the context of the specified WBS element.
  WBS Element Settings: The WBS element may have specific settings or configurations that restrict the use of certain materials.
  Project Definition: The project definition associated with the WBS element may have limitations on the types of materials that can be used.
  Authorization Issues: The user may not have the necessary authorizations to use the material with the specified WBS element.
  Material Type: The material type may not be compatible with the WBS element due to configuration settings in the