This I already wrote about above, in STMS when I display TMS configuration for Q system I see on Transport Tool tab TRANSDIR set to \\sapsrvP\sapmnt\trans. But from there if I select in menu Goto->TP parameters, I can see that parameter TRANSDIR is set tp \\sapsrvQ\sapmnt\trans .
Communication tab look ok, same domain as P system, same group as P system.
In STMS when I go to system overview and select Q system, then in menu
SAP System -> Check -> Transport Directory (tests against TRANSDIR \\sapsrvQ\sapmnt\trans)
SAP System -> Check -> Transport Tool
gives ok results.
When I change DIR_TRANS in sap instance profile to \\sapsrvP\sapmnt\trans then...
In STMS when I go to system overview and select Q system, then in menu
SAP System -> Check -> Transport Directory (tests against TRANSDIR \\sapsrvP\sapmnt\trans)
SAP System -> Check -> Transport Tool
both fail complaining that transdir is not accessible.