How To Fix MMRP01333 - Loop at line &1

MMRP01333 - Overview

• Message type: E = Error

• Message class: MMRP01 - Rapid Planning Matrix

• Message number: 333

• Message text: Loop at line &1

What causes this issue?

The sequence of line segments can go back on itself, that means there
is a series of line segements (A1, A2, ..., Ax) whereby each segment Ai
(where i is the number of the current segment) is the predecessor of
A(i+1) and Ax is the predecessor of A1.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

MMRP01333 - Details

• The SAP error message MMRP01333, which states "Loop at line &1," typically occurs in the context of material master data processing, particularly when dealing with material requirements planning (MRP) or inventory management. This error indicates that there is a loop in the processing logic, which can happen due to various reasons, such as incorrect configuration, data inconsistencies, or issues in the master data.
  Causes:
  
  Data Inconsistencies: There may be inconsistencies in the material master data, such as circular references or incorrect settings in the MRP views.
  
  Configuration Issues: Incorrect configuration in the MRP settings or in the related modules can lead to loops in processing.
  Custom Code: If there are custom enhancements or user exits that manipulate MRP data, they might inadvertently create loops.
  Master Data Issues: Problems with the material master records, such as missing or incorrect data in the relevant fields.
  
  Solutions:
  
  Check Material Master Data: Review the material master records for the materials involved.