How To Fix MN307 - Week & not allowed (internal error)

MN307 - Overview

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 307

• Message text: Week & not allowed (internal error)

What causes this issue?

Week &V1& is not allowed (invalid character, not in admissible range,
etc.). The field may even be empty.
The error occurred in function module &V2&. It may be due to one of the
following reasons:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

internal program error
faulty call of function module &V2& with invalid or inconsistent data

System Response

How to fix this error?

Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

MN307 - Details

• The SAP error message MN307 ("Week & not allowed (internal error)") typically occurs in the context of the SAP system's handling of time-related data, particularly in the areas of time management or payroll processing. This error can arise due to various reasons, including configuration issues, data inconsistencies, or system bugs.
  Possible Causes:
  
  Incorrect Configuration: The configuration settings for the time management or payroll module may not be set up correctly, leading to the system rejecting certain weeks.
  Data Inconsistencies: There may be inconsistencies in the time data, such as overlapping time entries or incorrect date formats.
  Calendar Issues: The calendar settings in the system may not align with the expected weeks, especially if there are custom calendars or holiday settings.
  Internal System Error: This could be a bug or an internal error within the SAP system that needs to be addressed by SAP support.
  
  Solutions:
  
  Check Configuration: Review the configuration settings for the time management or payroll