How To Fix C1304 - Allowed character before exponent: + or -. Example: E-__

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 304

• Message text: Allowed character before exponent: + or -. Example: E-__

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message C1304 - Allowed character before exponent: + or -. Example: E-__ ?

  The SAP error message C1304, which states "Allowed character before exponent: + or -," typically occurs in the context of numeric fields where a scientific notation is expected. This error indicates that the system encountered an invalid character before the exponent part of a number in scientific notation.
  Cause:
  The error is usually caused by one of the following:
  
  Invalid Input Format: The input value does not conform to the expected format for scientific notation. For example, if you have a number like 1E2 (which is valid), but you input something like 1E+2 or 1E-2, and the system expects a different format.
  Leading Characters: There may be characters before the exponent that are not allowed. For instance, if you input 1E2.5, the .5 is not valid in this context.
  Incorrect Data Type: The field may be expecting a different data type (e.g., a string instead of a number).
  
  Solution:
  To resolve the C1304 error, you can take the following steps:
  
  
  Check Input Format: Ensure that the number is in the correct scientific notation format. The correct format is typically numberE+/-exponent, where the exponent is an integer.
  
  Example of valid formats: 1E2, 1E-3, 1E+4
  Example of invalid formats: 1E2.5, 1E2+, 1E2-3.5
  
  
  
  Remove Invalid Characters: Make sure there are no invalid characters before the exponent. Only + or - should precede the exponent.
  
  
  Data Type Verification: Ensure that the field you are entering the value into is of the correct data type. If it expects a numeric value, ensure you are not entering a string or other incompatible type.
  
  
  Consult Documentation: If you are unsure about the expected format, refer to the SAP documentation or the specific module's guidelines for numeric input.
  
  
  Testing: After making corrections, test the input again to see if the error persists.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error.
  Field Documentation: Review the field documentation in the SAP system to understand the expected input format.
  User Forums: Consider searching or posting in SAP community forums for additional insights from other users who may have encountered the same issue.
  
  By following these steps, you should be able to resolve the C1304 error and successfully input the desired numeric value.