How To Fix SY146 - Negative argument for LOG not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 146

• Message text: Negative argument for LOG not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY146 - Negative argument for LOG not allowed ?

  The SAP error message SY146: Negative argument for LOG not allowed typically occurs when a logarithmic function is called with a negative argument. In SAP ABAP, the logarithm function (LOG) is defined only for positive numbers, and passing a negative value will trigger this error.
  Cause:
  The error arises when the input to the logarithmic function is negative or zero. This can happen due to various reasons, such as:
  
  Incorrect calculations leading to a negative value.
  Data inconsistencies or unexpected values in the database.
  Logical errors in the program where the input to the LOG function is not properly validated.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Input Validation: Before calling the LOG function, ensure that the input value is positive. You can use an IF statement to check the value:
  IF value > 0.
      result = LOG( value ).
  ELSE.
      " Handle the error case, e.g., set result to a default value or raise an error message
      WRITE: 'Error: Input value must be positive'.
  ENDIF.
  
  
  Debugging: If the error occurs unexpectedly, use the ABAP debugger to trace the values being passed to the LOG function. This will help you identify where the negative value is coming from.
  
  
  Data Integrity Checks: If the input value is derived from database tables or user inputs, ensure that there are checks in place to maintain data integrity. This may involve validating data before it is processed.
  
  
  Error Handling: Implement proper error handling to manage cases where the input is not valid. This could involve logging the error, notifying the user, or taking corrective actions.
  
  
  Related Information:
  
  Logarithmic Functions in ABAP: The LOG function in ABAP is used to calculate the natural logarithm of a number. The syntax is LOG( value ), where value must be greater than zero.
  Mathematical Functions: Familiarize yourself with other mathematical functions in ABAP and their requirements to avoid similar issues.
  Documentation: Refer to the official SAP documentation for more details on mathematical functions and error handling in ABAP.
  
  By following these steps, you should be able to resolve the SY146 error and prevent it from occurring in the future.