How To Fix MW645 - Quotas in the different allocation categories must be different

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 645

• Message text: Quotas in the different allocation categories must be different

What causes this issue?

For allocation rule generation, the allocation categories in the model
allocation rule must be assigned different quota values.
When allocation rules are generated referencing a model allocation
rule, allocation categories are used for grouping the plants together.
The system groups the plants based on the RIS key figure value for an
allocation category in the model allocation rule, proceeding as
follows:
Determination of the largest key figure value
The allocation category with the largest quota value is assigned to
this key figure value.
Using the rule of three, the upper limit of the remaining allocation
categories is calculated on the basis of the first category.
Each plant is assigned to an allocation category in the allocation rule
on the basis of its key figure value.
The value of the allocation category is assigned a quota to the plants
in an allocation category. This grouping can then be used to create an
allocation rule.

System Response

The allocation rule cannot be created.

How to fix this error?

Assign different values for the allocation categories in the model
allocation rule.

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

How can this happen?

<LS>Model allocation rule</>
Allocation category Quota
Category 1 (fast-mover) 500
Category 2 (slow-mover) 250
Key figures
Plant Key figure value (e.g. sales in thousands)
Plant1 1000
Plant2 600
Plant3 400
Calculation of allocation category upper limits:
1st allocation category for fast-movers: 500 <=> 1000
2nd allocation category for slow-movers: 250 <=> x
=> 1000/500x250 = 500
Allocation category assignments:
Category 1: Plant1, Plant2
Category 2: Plant3

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 MW645 - Quotas in the different allocation categories must be different ?

  The SAP error message MW645, which states "Quotas in the different allocation categories must be different," typically occurs in the context of materials management, particularly when dealing with quota arrangements in purchasing or inventory management.
  Cause:
  This error arises when there are conflicting quota arrangements for a material across different allocation categories. In SAP, quotas are used to manage the distribution of procurement sources or suppliers for a particular material. Each allocation category should have a unique quota, and if two or more categories are assigned the same quota, the system will trigger this error.
  Solution:
  To resolve the MW645 error, you can follow these steps:
  
  
  Check Quota Arrangements:
  
  Go to the transaction code MEQ1 (Create Quota Arrangement) or MEQ2 (Change Quota Arrangement) to review the quota arrangements for the material in question.
  Ensure that each allocation category has a unique quota assigned to it.
  
  
  
  Modify Quota Categories:
  
  If you find that two or more allocation categories are using the same quota, you will need to modify one or more of the categories to ensure they are different.
  You can do this by changing the quota arrangement in the relevant transaction.
  
  
  
  Review Material Master Data:
  
  Check the material master data to ensure that the allocation categories are correctly defined and that there are no inconsistencies.
  
  
  
  Consult Documentation:
  
  If you are unsure about how to set up quota arrangements, refer to SAP documentation or consult with your SAP functional consultant for guidance on best practices.
  
  
  
  Testing:
  
  After making the necessary changes, test the procurement process again to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  Quota Arrangement: A quota arrangement in SAP is a way to manage the procurement of materials from different sources. It allows you to specify how much of a material should be procured from each supplier.
  Allocation Categories: These are classifications used in quota arrangements to differentiate between various sources or suppliers.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MEQ1, MEQ2, and MEQ3 (Display Quota Arrangement) for managing quota arrangements.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who can provide deeper insights into the specific configuration of your SAP system.