How To Fix MG178 - Period indicator &1 must not be used together with MRP type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MG - Batch input: material master

• Message number: 178

• Message text: Period indicator &1 must not be used together with MRP type &2

What causes this issue?

You have changed the period indicator or the MRP type. The combination
of period indicator &v1& together with MRP type &v2& must not be used
since for MRP type &v2& functionality 'Material Doc.' is switched on.
This setting is not supported.

System Response

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

How to fix this error?

Change the settings. Otherwise the determination of consumption values
would not be correct.

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 MG178 - Period indicator &1 must not be used together with MRP type &2 ?

  The SAP error message MG178 indicates a conflict between the period indicator and the MRP (Material Requirements Planning) type assigned to a material. This error typically arises when the system detects that the combination of the specified period indicator and MRP type is not valid according to the configuration settings in SAP.
  Cause:
  
  Invalid Combination: The period indicator (e.g., weekly, monthly) you are trying to use is not compatible with the specified MRP type (e.g., MRP type 'PD' for MRP, 'VB' for consumption-based planning, etc.). Each MRP type has specific rules regarding which period indicators can be used.
  Configuration Settings: The settings in the material master or MRP configuration may not allow the combination you are trying to use. This can be due to standard SAP settings or custom configurations made by your organization.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03) and check the MRP views.
  Verify the MRP type assigned to the material and the period indicator settings.
  
  
  
  Review MRP Type Configuration:
  
  Use transaction code OMD0 to access the MRP type configuration.
  Check the settings for the MRP type in question and see which period indicators are allowed.
  
  
  
  Change the Period Indicator or MRP Type:
  
  If the combination is indeed invalid, you may need to change either the period indicator or the MRP type to a valid combination.
  This can be done in the material master (transaction code MM02) or by changing the MRP type in the configuration.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help files for specific details on the allowed combinations of MRP types and period indicators.
  
  
  
  Testing:
  
  After making changes, test the MRP run again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  MRP Types: Different MRP types have different planning strategies and requirements. Understanding the implications of each MRP type is crucial for effective material planning.
  Period Indicators: These are used to define the time frame for planning and can affect how stock levels are calculated and managed.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or provide updates related to this error message.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in MRP and material management.