is it possible, that this issue is corresponding to this one:
http://scn.sap.com/thread/3377950
and sap-note 1873177
https://service.sap.com/sap/support/notes/1873177
that looks for me like a software-concept mistake, and that means a stop for our upgrade.
so, upgrades of doublestack PI-system is inpossible, new software is not available yet.