Hello
Are you really suggesting a solution or replying based on some assumptions ?
Do you how an upgrade is carried out and how it is done ?
Read the replies carefully and reply only if you are sure what the problem is.
Mohd Basis do not terminate any TP or R3trans processes when the shadow import is in process.
You need to wait until the phase completes.
Like I said before, check the upgrade logs in the /<upgrade_directory>/abap/tmp and /<upgrade_directory>/abap/log directories.
Regards
RB