How To Fix WRF_APC595 - Enter units of measures and call up this screen again

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 595

• Message text: Enter units of measures and call up this screen again

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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• What is the cause and solution for SAP error message WRF_APC595 - Enter units of measures and call up this screen again ?

  SAP Error Message:
  
  WRF_APC595 – Enter units of measures and call up this screen again
  
  Cause:
  This error occurs in SAP when the system expects the user to enter units of measure (UoM) for a particular material or process step, but the required units have not been provided. Typically, this happens in the context of Advanced Planning and Optimization (APO) or when working with product master data, production orders, or process instructions where units of measure are mandatory for calculations or planning.
  In other words, the system cannot proceed because it lacks the necessary unit of measure information to perform the required operation.
  
  Solution:
  
  
  Enter the Required Units of Measure:
  
  Go back to the screen or transaction where the error appeared.
  Provide the missing unit(s) of measure as requested.
  This could be the base unit of measure, alternative units, or specific units related to the process step.
  
  
  
  Check Material Master Data:
  
  Verify that the material master record has the correct units of measure maintained.
  Use transaction MM03 to display the material and check the units of measure tab.
  Ensure that the base unit of measure and any alternative units are properly defined.
  
  
  
  Review Configuration:
  
  If this error occurs during planning or production order processing, check the configuration settings related to units of measure in APO or PP.
  Ensure that the system is correctly set up to handle the units of measure for the relevant process.
  
  
  
  Re-enter or Refresh the Screen:
  
  After entering the units of measure, call up the screen again as the message suggests.
  This allows the system to reprocess the data with the correct units.
  
  
  
  
  Related Information:
  
  This message is often encountered in SAP APO (Advanced Planning and Optimization), especially in the Production Planning and Detailed Scheduling (PP/DS) or Demand Planning modules.
  Units of measure are critical for accurate planning, scheduling, and production execution.
  If you frequently encounter this message, consider reviewing your master data maintenance processes to ensure units of measure are always entered correctly.
  For further troubleshooting, check SAP Notes or consult the SAP Help Portal for your specific SAP version and module.
  
  
  Summary:
  
  The error WRF_APC595 indicates missing units of measure. To resolve it, enter the required units of measure in the relevant screen or material master, then retry the operation. Proper maintenance of units of measure in master data and configuration prevents this error.