How To Fix C$502 - Line &: Key field & is missing

C$502 - Overview

• Message type: E = Error

• Message class: C$ -

• Message number: 502

• Message text: Line &: Key field & is missing

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message C$502 - Line &: Key field & is missing ?

  The SAP error message C$502, which states "Line &: Key field & is missing," typically occurs in the context of data entry or processing in SAP, particularly when dealing with line items in a document or transaction. This error indicates that a required key field, which is essential for identifying a record or line item, is not populated.
  
  Cause:
  
  Missing Key Field: The most common cause is that a mandatory key field (such as a material number, customer number, or vendor number) has not been filled in for one or more line items in a document.
  Data Entry Error: Users may have inadvertently skipped a field or made a mistake while entering data.
  
  Configuration Issues: There may be issues with the configuration of the document type or transaction that requires certain fields to be filled but are not set up correctly.
  Custom Development: If there are custom programs or enhancements, they may not be handling