First, I do update my TLE list routinely with TLEs from Mike McCants. I am on a Macintosh running Gpredict (version 2.2.1 though the "About" claims 1.3) under Unix. I save a plain text file in a folder, give it a name like new-tle.txt - and update.
A pal tracked a very interesting satellite - we think that it is SensorSat or ORS-5. It is a low altitude, near zero inclination, satellite and so very unusual.
The pal sent me a couple of TLEs and I am getting the "ignore input" problem. I have the TLE in a plain text file in a folder, the file has the name of a Celestrak set of TLEs. I am doing this the way that I always do - and it works with the TLEs from McCants.
I got Cees Bassa to send a TLE - it is also ignored.
I opened the file with VIM and do not see any invisible characters in it.
Hmmmm. Ideas? I wonder if it is some problem with line endings? How does Gpredict recognize a TLE when it is in a file?
It would be helpful if a future fix could be to report back to users when we ask Gpredict to update from local files - and the application does not see a TLE in the folder.
I could happily send a copy of the TLE if anyone is interested.
Spaceflight Research, LLC