get rid of Warnings concerning hard-coded transfer functions
Remove the warning:
'The transfer function name "', trim(name) , '" is not registered.'
Also, we need to improve the message about the delete string:
log_warn(*) "delete string is not empty, returning input string: " // trim(funcString)
log_warn(*) " detete string = " // trim(deleteString)
It is a common warning/error and should be more helpful to the user.