How To Fix REORRS020 - Reservation object &1 not allowed to be reserved in selected period

SAP Error Message - Details

• Message type: E = Error

• Message class: REORRS - Messages for Reservation

• Message number: 020

• Message text: Reservation object &1 not allowed to be reserved in selected period

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message REORRS020 - Reservation object &1 not allowed to be reserved in selected period ?

  The SAP error message REORRS020 indicates that a reservation object (such as a material or a service) is not allowed to be reserved in the selected period. This typically occurs in the context of inventory management or production planning when trying to create or modify a reservation.
  Cause:
  
  Period Restrictions: The reservation object may have restrictions that prevent it from being reserved during the specified period. This could be due to settings in the material master or configuration settings in the system.
  Availability Check: The system may be performing an availability check that determines that the item cannot be reserved due to stock levels or other constraints.
  Status of the Object: The reservation object might be in a status that does not allow it to be reserved (e.g., blocked, not released).
  Configuration Settings: There may be configuration settings in the system that restrict reservations for certain materials or in certain scenarios.
  
  Solution:
  
  Check Material Master Data: Review the material master data for the reservation object to ensure that it is set up correctly and does not have any restrictions for the selected period.
  Review Reservation Period: Ensure that the period you are trying to reserve the object for is valid and does not fall outside of any defined parameters.
  Check Availability: Verify the availability of the material in the system. If the material is not available, you may need to adjust stock levels or change the reservation date.
  Status Check: Ensure that the reservation object is in a status that allows it to be reserved. If it is blocked or not released, you may need to change its status.
  Consult Configuration: If you have access to configuration settings, check if there are any specific rules or settings that might be preventing the reservation. This may require assistance from a system administrator or SAP consultant.
  Error Logs: Check the error logs or transaction codes related to reservations (like MB21 for creating reservations) for more detailed information about the error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB21 (Create Reservation), MB22 (Change Reservation), and MB23 (Display Reservation).
  SAP Notes: Search for SAP Notes related to the error message REORRS020 in the SAP Support Portal for any known issues or patches.
  Documentation: Review SAP documentation or help files related to inventory management and reservations for additional context and troubleshooting steps.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in inventory management.