After the last update of the APRS servers my weather station push script didn't worked anymore. Starting from version aprsc 2.1.23 (or maybe lower, don't know) the server is enforcing a version number of the app when logging in.
Login string should now look like so:
user {user} pass {passcode} vers foo.py 1.0
Check if your stuff still works.
Error message was:
# Invalid login: software name and version are not separated by a space