How To Fix GPSC090 - Calculation Scheme for Category &1 only has a single Contractor rate

SAP Error Message - Details

• Message type: E = Error

• Message class: GPSC - PSC Application

• Message number: 090

• Message text: Calculation Scheme for Category &1 only has a single Contractor rate

What causes this issue?

Only one step is allowed in the Calculation Scheme for this Calculation
Category

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message GPSC090 - Calculation Scheme for Category &1 only has a single Contractor rate ?

  The SAP error message GPSC090 indicates that there is an issue with the calculation scheme for a specific category in the system. This error typically arises when the calculation scheme is set up in such a way that it only contains a single contractor rate, which may not be sufficient for the intended calculations or processes.
  Cause:
  
  Single Contractor Rate: The primary cause of this error is that the calculation scheme for the specified category (indicated by &1) has only one contractor rate defined. This can happen if the configuration for the calculation scheme is incomplete or if the necessary rates have not been set up correctly.
  Configuration Issues: There may be issues in the configuration of the calculation scheme or the related master data that prevent multiple contractor rates from being defined.
  Data Entry Errors: Incorrect data entry or missing data in the relevant tables can also lead to this error.
  
  Solution:
  
  Review Calculation Scheme: Check the configuration of the calculation scheme for the specified category. Ensure that it is set up to allow for multiple contractor rates.
  Add Additional Rates: If the calculation scheme is intended to have multiple rates, you will need to add the necessary contractor rates in the configuration. This can typically be done in the SAP system under the relevant customizing settings.
  Check Master Data: Verify that the master data related to contractors and rates is complete and accurate. Ensure that all necessary rates are defined and linked to the appropriate calculation scheme.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on setting up calculation schemes and contractor rates.
  Testing: After making changes, perform tests to ensure that the error no longer occurs and that the calculations are functioning as expected.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as SPRO (for configuration) or other relevant transaction codes to access the calculation scheme settings.
  SAP Notes: Check for any SAP Notes related to this error message for additional insights or patches that may address the issue.
  Support: If the problem persists after attempting the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By addressing the configuration and ensuring that multiple contractor rates are defined, you should be able to resolve the GPSC090 error message.