How To Fix IM426 - Error during date calculation: Time entered not numerical

SAP Error Message - Details

• Message type: E = Error

• Message class: IM - Maintenance notifications

• Message number: 426

• Message text: Error during date calculation: Time entered not numerical

What causes this issue?

An error occurred when calculating the ,internal date. The date format
for that point in time is not numerical and can therefore not be
represented.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IM426 - Error during date calculation: Time entered not numerical ?

  The SAP error message IM426 ("Error during date calculation: Time entered not numerical") typically occurs when there is an issue with the time format or the data being entered in a field that expects a numerical value. This error is often encountered in modules related to maintenance, inventory management, or production planning where time calculations are necessary.
  Cause:
  
  Non-Numerical Input: The most common cause is that the input for a time field is not in a numerical format. For example, entering a string or special characters instead of a number.
  Incorrect Field Format: The field may be expecting a specific format (e.g., hours and minutes) and the input does not conform to that format.
  Data Type Mismatch: The system may be expecting a numerical value but is receiving a different data type (e.g., text).
  Configuration Issues: There may be configuration settings in the SAP system that are not set up correctly, leading to this error.
  
  Solution:
  
  Check Input Values: Ensure that all time-related fields are filled with numerical values. For example, if the field expects hours, make sure you are entering a number (e.g., 5 for 5 hours).
  Verify Field Format: Check the expected format for the time field. If it requires a specific format (like HH:MM), ensure that you are entering the data correctly.
  Review Data Entry: If you are copying and pasting data, ensure that there are no hidden characters or spaces that could cause the input to be non-numerical.
  Consult Documentation: Refer to the SAP documentation or help files for the specific transaction or module you are using to understand the expected input formats.
  Check Configuration: If you have access, review the configuration settings related to the module you are working in to ensure that they are set up correctly.
  Test with Different Values: Try entering different numerical values to see if the error persists, which can help isolate the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its system, and there may be specific notes addressing this error.
  Transaction Codes: If you are working in a specific transaction code, ensure that you are following the correct procedures for that transaction.
  User Forums: Consider visiting SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the problem persists after trying the above solutions, it may be beneficial to contact your SAP support team or a consultant for further assistance.