Module function 

Functions

arity_mismatch

Function called with wrong number of arguments

execution_failed

Function execution failed with a specific reason

generator_not_found

Generator function is not recognized or does not exist

internal_error

Internal function error - should not normally occur

invalid_argument_type

Argument has invalid type for function

missing_input

Function requires input but none was provided

too_many_arguments

Too many arguments provided to function

undefined_argument

Argument is undefined/null when a value is required

unknown_function

Function is not recognized or does not exist