How To Fix CM_EHFND_FW_WFF128 - Cron string &1 contains invalid characters

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_EHFND_FW_WFF - Messages for Exception Obj. of EHS/PS&S Workflow Foundation

• Message number: 128

• Message text: Cron string &1 contains invalid characters

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CM_EHFND_FW_WFF128 - Cron string &1 contains invalid characters ?

  The SAP error message CM_EHFND_FW_WFF128 indicates that there is an issue with a cron string that contains invalid characters. Cron strings are used in SAP to schedule jobs and tasks, and they follow a specific format that must adhere to certain rules.
  Cause:
  The error is triggered when the cron string provided contains characters that are not allowed. Common causes include:
  
  Typographical errors in the cron string.
  Use of unsupported characters or symbols.
  Incorrect formatting of the cron string (e.g., missing fields, extra spaces).
  
  Cron String Format:
  A typical cron string consists of five fields (for minute, hour, day of month, month, and day of week) and may include special characters like:
  
  * (asterisk) - represents all values.
  , (comma) - separates multiple values.
  - (dash) - defines a range of values.
  / (slash) - specifies increments.
  
  Solution:
  
  
  Review the Cron String: Check the cron string for any invalid characters or formatting issues. Ensure that it only contains valid characters as per the cron syntax.
  
  
  Correct the Format: Make sure the cron string is correctly formatted. For example, a valid cron string might look like:
  0 12 * * 1-5
  This would mean "At 12:00 PM, Monday through Friday."
  
  
  Use a Cron Validator: Consider using an online cron expression validator to check the validity of your cron string.
  
  
  Refer to Documentation: Consult the SAP documentation or help resources for specific guidelines on cron string formatting in the context of your SAP system.
  
  
  Test Changes: After making corrections, test the cron string to ensure that it works as expected without generating errors.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or solutions for this error.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  System Logs: Review system logs for any additional error messages or warnings that might provide more context about the issue.
  
  By following these steps, you should be able to resolve the error related to the invalid cron string in your SAP system.