On 08 Aug 2023, Alexander Grotewohl said the following...
 
 AG> if you're comfortable doing a little programming you could probably make
 AG> a script to read the lines in file.lst then run gkermit like it wants:
 AG> 
 AG>   /usr/bin/gkermit -d /tmp/kermit-send.log -Ts file1 file2 file3
 AG> 
 AG> (or maybe it needs -Ts in front of every file.. don't use it so i can't
 AG> test it..)

I am grateful for your thoughts, with them I have made this script;

#!/usr/bin/env bash
FILELIST="$1"
FILES=$(cat $FILELIST|tr '\n' ' ')
for FILE in $FILES; do
        echo "/usr/bin/gkermit -d /tmp/kermit-send.log -XTs $FILE"
        /usr/bin/gkermit -d /tmp/kermit-send.log -XTs $FILE
done

... and then in the protocol editor I use this;

      Active ³ Yes
          OS ³ All
       Batch ³ Yes
     Hot Key ³ K
 Description ³ Kermit (testing)
Send Command ³ /mystic/kermit_batch.sh %3
Recv Command ³ /usr/bin/gkermit -d /tmp/kermit-recv.log -XTr %3

I've tested using "qodem" terminal, and with a single and multiple files in a batch it works perfectly (to download from the BBS to the client).

I shall next attempt to test the uploads, but I assume this will just be ok as it is.

I shall let y'all know how it goes. 
FWIW kermit seems to be much quicker than zmodem =)

... That's not a bug, it's an undocumented feature

--- Mystic BBS v1.12 A48 2022/07/15 (Linux/64)