How To Fix HTTP_CHW_UI_MSG201 - The url &1 contains cr_lf and cannot be processed.

SAP Error Message - Details

• Message type: E = Error

• Message class: HTTP_CHW_UI_MSG - strings for output in http alv

• Message number: 201

• Message text: The url &1 contains cr_lf and cannot be processed.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message HTTP_CHW_UI_MSG201 - The url &1 contains cr_lf and cannot be processed. ?

  The SAP error message HTTP_CHW_UI_MSG201 indicates that the URL being processed contains carriage return (CR) and line feed (LF) characters, which are not allowed in URLs. This error typically occurs when there is an attempt to use a URL that has been improperly formatted or contains invalid characters.
  Cause:
  
  Improper URL Formatting: The URL may have been constructed incorrectly, possibly due to concatenation of strings that include newline characters.
  User Input: If the URL is being generated based on user input, the user may have inadvertently included line breaks or other invalid characters.
  Data Source Issues: If the URL is being pulled from a database or external source, the data may contain unexpected characters.
  
  Solution:
  
  
  Check URL Construction: Review the code or configuration where the URL is being constructed. Ensure that no CR or LF characters are included. You can use string manipulation functions to remove or replace these characters.
  Example in ABAP:
  REPLACE ALL OCCURRENCES OF cl_abap_char_utilities=>cr_lf IN string WITH ''.
  
  
  Validate User Input: If the URL is based on user input, implement validation to ensure that the input does not contain CR or LF characters. You can use regular expressions or string functions to check for these characters.
  
  
  Sanitize Data Sources: If the URL is being retrieved from a database or external source, ensure that the data is sanitized before being used. This may involve cleaning up the data in the source or applying transformations in your application.
  
  
  Debugging: If the issue persists, enable debugging to trace the exact point where the URL is being generated. This can help identify the source of the invalid characters.
  
  
  Related Information:
  
  URL Encoding: While CR and LF characters cannot be included in URLs, other special characters can be encoded using percent-encoding. Familiarize yourself with URL encoding standards if you are dealing with user-generated URLs.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are documented in SAP Notes.
  Documentation: Refer to the SAP documentation for the specific module or function you are working with to understand how URLs should be formatted and any constraints that may apply.
  
  By addressing the root cause of the invalid characters in the URL, you should be able to resolve the HTTP_CHW_UI_MSG201 error.