I am running Gpredict 1.3 on Debian Stretch and I have noticed that a lot of Transponder info are missing. I have updated TLE info a lot of times but still no joy. Just to name a few: XW series, AO-7, etc, display an empty transponder tag.
Version 1.3 is very old (5+ years) you need to add the info yourself.
The latest version 2.2 uses the SatNOGS database as source and data can be updated in a crowd-sourced manner.
Thanks for the info. I downloaded an compiled 2.2.1: works like a charm.
Sounds good. Enjoy!