How To Fix WRF_APC579 - Calculation is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_APC - Messages for Operational Assortment Planning and Control

• Message number: 579

• Message text: Calculation is not possible

What causes this issue?

Calculation is not possible

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?

You can enter either markup1 with purchasing price net/net or purchasing
price net/net with markup2.

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 WRF_APC579 - Calculation is not possible ?

  The SAP error message WRF_APC579: Calculation is not possible typically occurs in the context of APC (Activity Price Calculation) or Product Costing processes, especially when the system tries to perform a cost calculation but encounters data or configuration issues that prevent the calculation from completing.
  
  Cause of WRF_APC579
  This error generally indicates that the system cannot perform the calculation due to one or more of the following reasons:
  
  
  Missing or Incomplete Master Data:
  
  Costing variant, costing version, or costing sheet is not properly maintained.
  Missing or incorrect activity types or activity prices.
  Missing or incomplete routing or work center data.
  Missing or incorrect cost component structure or cost element assignments.
  
  
  
  Incorrect or Inconsistent Configuration:
  
  The costing variant or costing version used is not valid or active.
  The calculation key or valuation variant is not properly set.
  The cost center or activity price is not maintained or locked.
  
  
  
  Data Inconsistencies:
  
  The system cannot find valid prices or rates for activities or materials.
  The calculation base (e.g., quantity structure, BOM, routing) is incomplete or inconsistent.
  The system encounters zero or negative values where positive values are expected.
  
  
  
  Authorization or System Issues:
  
  User does not have the required authorization to perform the calculation.
  System inconsistencies or bugs in the costing calculation program.
  
  
  
  
  Solution / How to Resolve
  To resolve the WRF_APC579 error, follow these steps:
  
  
  Check Master Data:
  
  Verify that all relevant master data (costing variant, costing version, cost component structure, activity types, work centers, routings, BOMs) are correctly maintained and active.
  Ensure activity prices are maintained for all relevant activity types in the controlling area.
  
  
  
  Validate Configuration:
  
  Check the costing variant and costing version settings.
  Confirm that the valuation variant and costing sheet are correctly assigned and active.
  Verify that the cost center and activity price are valid and not locked.
  
  
  
  Review Costing Data:
  
  Run transaction CK11N or CK40N to simulate the costing and check for missing data or errors.
  Use transaction KSU5 to check activity price calculation and ensure activity prices exist.
  
  
  
  Check for Data Consistency:
  
  Ensure BOM and routing are complete and valid.
  Check for zero or negative quantities or prices that might cause calculation failure.
  
  
  
  Authorization and System Checks:
  
  Confirm the user has the necessary authorizations.
  Check for OSS notes or SAP support messages related to this error.
  If the problem persists, consider debugging the costing calculation program or contacting SAP support.
  
  
  
  
  Related Information
  
  
  Transactions:
  
  CK11N – Create Single Cost Estimate
  CK40N – Costing Run
  KSU5 – Activity Price Calculation
  CA02 – Change Routing
  CS02 – Change BOM
  
  
  
  SAP Notes:
  
  Search SAP OSS Notes for message WRF_APC579 for any known bugs or patches.
  
  
  
  Documentation:
  
  SAP Help Portal on Product Costing and Activity Price Calculation.
  SAP Controlling (CO) module documentation.
  
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WRF_APC579: Calculation is not possible
  
  
  Cause
  Missing/incomplete master data, incorrect configuration, data inconsistencies, or authorization issues
  
  
  Solution
  Verify and correct master data, configuration, and costing data; check authorizations; run costing simulations
  
  
  Related Transactions
  CK11N, CK40N, KSU5, CA02, CS02
  
  
  Additional Help
  SAP OSS Notes, SAP Support, SAP Help Portal
  
  
  
  
  If you provide more context (e.g., which transaction you encountered the error in, or specific costing scenario), I can help with more targeted troubleshooting steps.