Maxima 5.27.0 is a couple of years old, and the code to which OP refers does not exist anymore. Perhaps OP can try it again with a current version of Maxima.
I have tried the same operation with a current version of Maxima (post-5.33 from Git) and it works as expected. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

