How To Fix VHUMI187 - Reservation item &1: Special stock number &2 not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: VHUMI - Messages for material identification

• Message number: 187

• Message text: Reservation item &1: Special stock number &2 not allowed

Self-Explanatory Message

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• What is the cause and solution for SAP error message VHUMI187 - Reservation item &1: Special stock number &2 not allowed ?

  The SAP error message VHUMI187 indicates that there is an issue with a reservation item related to special stock. Specifically, the message states that the special stock number specified is not allowed for the reservation item in question. This typically occurs in scenarios involving inventory management and special stock types, such as consignment stock, project stock, or returnable packaging.
  Cause:
  
  Invalid Special Stock Number: The special stock number provided in the reservation does not correspond to a valid stock type or is not allowed for the specific reservation item.
  Configuration Issues: The system may not be configured to allow the use of certain special stock types for the reservation.
  Stock Type Restrictions: The stock type associated with the special stock number may have restrictions that prevent it from being used in the context of the reservation.
  Data Entry Errors: There may be a typographical error in the special stock number or reservation item.
  
  Solution:
  
  Check Special Stock Number: Verify that the special stock number entered is correct and corresponds to a valid stock type that can be used for the reservation.
  Review Reservation Item: Ensure that the reservation item is compatible with the special stock type. Check the material master data and the configuration settings for the material.
  Configuration Review: If you have access, review the configuration settings in the SAP system to ensure that the special stock type is allowed for reservations. This may involve checking the settings in the Inventory Management module.
  Consult Documentation: Refer to SAP documentation or help resources for specific details on the allowed special stock types for reservations.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert to investigate further.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as MB21 (Create Reservation) or MB22 (Change Reservation) to manage reservations.
  Material Master Data: Check the material master data for the material associated with the reservation to ensure that it is set up correctly for special stock.
  Special Stock Types: Familiarize yourself with the different types of special stock in SAP, such as consignment stock (K), project stock (P), and returnable packaging (R), to understand their implications on reservations.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.