Hi Prabhat,
I'm not sure that I've got your question now.
So far I've thought you want to update a message class from an uploadad file and wnat to create a transport request for it. Therfore you need a workbench transport request type 'K' once per report run.
Now you're telling that you want to use the same transport request for further report runs of the same user. But what to do, if another user runs this program.
I would recommend to create a transport request for each report run. But if you don't want that, you have to look for a fm which gives you the information about the open transport request from last run for this user. Also possible might be to get those informations directly from DDIC tables (for example E070 and E071). I don't know a fm, but E070 with field selection on trfunction, trstatus, as4user, strkorr and as4text has all informartions you need for that, if you fill as4text with a retrievable value.
Regards,
Klaus