How To Fix WS_TOOL480 - Only numbers or character strings (in apostrophes) are permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 480

• Message text: Only numbers or character strings (in apostrophes) are permitted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS_TOOL480 - Only numbers or character strings (in apostrophes) are permitted ?

  The SAP error message:
  WS_TOOL480: Only numbers or character strings (in apostrophes) are permitted
  
  
  Cause:
  This error typically occurs when you are trying to assign or compare a value in ABAP or within SAP tools (like the Web Service tool, or when working with dynamic selections, filters, or conditions) and the value format is incorrect.
  Specifically, the system expects either:
  
  A number (without quotes), or
  A character string enclosed in apostrophes (single quotes '...')
  
  If you provide a string without apostrophes or an invalid format (e.g., double quotes, no quotes for strings, or special characters), the system raises this error.
  
  Common Scenarios:
  
  When defining filter conditions in Web Service tools or selection screens.
  When dynamically building WHERE clauses or conditions in ABAP.
  When passing parameters to function modules or BAPIs that expect specific formats.
  When using transaction tools that require input in a specific format.
  
  
  
  Solution:
  
  Check the value format you are passing or entering.
  If the value is a string, enclose it in single