How To Fix W3_API201 - Theme names must contain numerals only

SAP Error Message - Details

• Message type: E = Error

• Message class: W3_API - WAB: API Messages

• Message number: 201

• Message text: Theme names must contain numerals only

Self-Explanatory Message

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• What is the cause and solution for SAP error message W3_API201 - Theme names must contain numerals only ?

  SAP Error Message:
  
  W3_API201 Theme names must contain numerals only
  
  Cause:
  This error occurs when you try to create or use a theme name in SAP Fiori or SAP UI5 that contains characters other than numerals. The system expects the theme name to be strictly numeric (digits 0-9) without any alphabetic or special characters.
  This restriction is typically related to the naming conventions enforced by the SAP Fiori launchpad or UI5 theming engine, where theme identifiers must be numeric strings to ensure consistency and avoid conflicts.
  
  Explanation:
  
  Theme names are identifiers used in SAP UI5/Fiori to apply custom styles.
  Some SAP systems or tools (like the Theme Designer or the Fiori launchpad configuration) require theme names to be numeric only.
  If you enter a theme name with letters, spaces, or special characters, the system throws this error.
  
  
  Solution:
  
  
  Use only numerals in the theme name.
  
  For example, instead of Theme01 or MyTheme123, use 01, 123, or any numeric string like 1001.
  
  
  Rename the theme to comply with the numeric-only rule.
  
  
  If you are using a tool or script to generate theme names, ensure it generates numeric-only names.
  
  
  
  Related Information:
  
  This error is commonly seen in SAP Fiori Theme Designer or when deploying custom themes.
  SAP UI5 themes are usually named with a prefix like sap_fiori_3 or custom names, but in some contexts (like certain API calls or configurations), only numeric theme names are allowed.
  Check SAP Notes or documentation related to your SAP UI5 or Fiori version for any updates on theme naming conventions.
  If you need to use alphanumeric theme names, verify if your SAP system or tool version supports it or if there is a configuration to relax this restriction.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  W3_API201 Theme names must contain numerals only
  
  
  Cause
  Theme name contains non-numeric characters
  
  
  Solution
  Rename theme to use only numeric characters (e.g., "001", "123")
  
  
  Context
  SAP Fiori Theme Designer, UI5 theming, Fiori launchpad configuration
  
  
  
  
  If you need further assistance, please provide the context where the error occurs (e.g., Theme Designer, Fiori launchpad configuration, API call) and the exact theme name you are trying to use.