How To Fix CJ757 - First character is already used in 'automatic number assignment'

SAP Error Message - Details

• Message type: E = Error

• Message class: CJ - Project master data and structure

• Message number: 757

• Message text: First character is already used in 'automatic number assignment'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CJ757 - First character is already used in 'automatic number assignment' ?

  The SAP error message CJ757, which states "First character is already used in 'automatic number assignment'," typically occurs in the context of project management within SAP, particularly when dealing with project definitions or WBS (Work Breakdown Structure) elements. This error indicates that the first character of the project number or WBS element you are trying to create is already in use, which violates the rules set for automatic number assignment.
  Cause:
  
  Duplicate First Character: The first character of the project number or WBS element you are trying to create is already assigned to another project or WBS element in the system.
  Number Range Configuration: The configuration for number ranges in the system may not allow for the first character you are trying to use.
  Custom Number Ranges: If your organization has custom number ranges set up, the first character may be restricted based on those settings.
  
  Solution:
  
  
  Check Existing Projects/WBS Elements: Verify if there are existing projects or WBS elements that start with the same first character. You can do this by using transaction codes like CJ20N (Project Builder) or CJ03 (Display Project) to search for existing entries.
  
  
  Change the First Character: If the first character is already in use, consider changing it to a different character that is not currently in use.
  
  
  Review Number Range Settings: Check the number range settings for project definitions and WBS elements. You can do this using transaction code OBN1 (Number Range Maintenance) or OIOA (Number Range Object Maintenance) to see if there are restrictions on the first character.
  
  
  Consult with SAP Basis or Configuration Team: If you are unsure about the number range configuration or how to change it, consult with your SAP Basis or configuration team. They can provide insights into the settings and help you adjust them if necessary.
  
  
  Use a Different Number Assignment Method: If automatic number assignment is causing issues, consider using manual number assignment for the specific project or WBS element.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N, CJ03, OBN1, and OIOA for managing projects and number ranges.
  SAP Documentation: Refer to SAP Help documentation for detailed information on project management and number range configuration.
  User Authorization: Ensure that you have the necessary authorizations to create or modify projects and number ranges in the system.
  
  By following these steps, you should be able to resolve the CJ757 error and successfully create your project or WBS element.