How To Fix CR177 - Finish time must not be before start time

SAP Error Message - Details

• Message type: E = Error

• Message class: CR - (1,099) Work Center; (100,200) Capacity

• Message number: 177

• Message text: Finish time must not be before start time

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CR177 - Finish time must not be before start time ?

  The SAP error message CR177 ("Finish time must not be before start time") typically occurs in the context of project management or production planning when the finish time of a task or activity is set to an earlier time than its start time. This can happen in various SAP modules, such as SAP Project System (PS) or SAP Production Planning (PP).
  Cause:
  
  Incorrect Time Entry: The finish time has been entered incorrectly, either manually or through a data import.
  System Configuration: There may be issues with the configuration of the project or task settings that do not allow for proper time entries.
  Data Migration Issues: If data has been migrated from another system, there may be inconsistencies in the time entries.
  User Error: Users may inadvertently enter the finish time before the start time due to misunderstanding the fields or the sequence of operations.
  
  Solution:
  
  Check Time Entries: Review the start and finish times for the task or activity in question. Ensure that the finish time is set to a time that is equal to or later than the start time.
  Correct Data: If the finish time is incorrect, update it to reflect a valid time frame.
  Review Dependencies: If the task is dependent on other tasks, ensure that the scheduling of those tasks is also correct.
  Consult Documentation: Refer to SAP documentation or user manuals for guidance on how to properly enter time data in the specific module you are using.
  User Training: Provide training for users on how to correctly enter and manage time data in SAP to prevent future occurrences of this error.
  System Configuration Review: If the issue persists, consult with your SAP administrator or technical team to review the configuration settings related to time management in the system.
  
  Related Information:
  
  Transaction Codes: Depending on the module, you may be using different transaction codes (e.g., CJ20N for Project Management, CO01 for Production Orders).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Forums: Engage with SAP community forums or user groups for additional insights and solutions from other users who may have encountered the same issue.
  Testing: After making corrections, test the changes in a development or quality assurance environment before applying them in production.
  
  By following these steps, you should be able to resolve the CR177 error and ensure that your project or production planning activities are scheduled correctly.