| Description | In case of an error, the math functions of VectorLib invoke the following steps:
- Set the result to the standard value appropriate for the respective function.
- Debug libraries only: Call V_noteError, if V_FPErrorHandlingMode contains fpErrorNote for the type of error that occurred.
- V_noteError constructs the appropriate error message and passes it to V_printErrorMsg, which is the function in charge of actually printing the error message.
By default, output is directed to the screen. This may be changed by a call to V_setErrorEventFile (see chapter 5.3).
"fname" is the name of the "complaining" function, and "why" specifies the reason for the complaint.
The parameter "why" may take on the following values:
1 for DOMAIN errors
2 for SING errors
3 for OVERFLOW errors
4 for UNDERFLOW errors
5 for TLOSS errors
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