I figured the logs would be different. It doesn't look like there are any error messages though.
As for the JDE.INI file changes, "read between the lines" is a good way to put it. There usually isn't anything in the instructions, but I have often found it useful to compare the new generic JDE.INI with my current one to see if there are changes we should be making. Then it is off to research if anything stands out. I looked at our file and I didn't see any changes we made when we jumped from 23ZA1 to 24.1.2.
Can you create a newly scheduled job to see if it will submit? (My favorite is the R0006P). If you set it up to submit in a few minutes that could tell if it is an architecture or it has to do with the existing scheduled records.
Also, is the Job Launcher running (if it exists on the 400)? In our system we have the scheduler kernel running, but there is a process called the Job Launcher which we can pause which will prevent scheduled jobs from submitting without stopping the scheduler kernel itself. In our system, when you start the services (including scheduler kernel) the Job Launcher is automatically started. The job launcher screen shows the next date and time a job will be launched. If the Job Launcher exists on the 400, does it show a good date and time for next submission?
Jer