Error: Requirements planning is not active in plant GP01. Message No. 61139
Reproducing the Issue: Run MRP for the Plant to reproduce the issue
Solution: Although you have maintained all MRP configurations and master data with proper MRP Type, you are still getting this error during MRP Run. Then, you can check this configuration to fix the issue.
SPRO –> Materials Management –> Consumption-Based Planning –> Planning –> Activate Material Requirements Planning


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Ganesh Padala