Nios II SBT for Eclipse debugger 10.0sp1 does it work for anybody ?

Well creating a full new windowsinstallation gave way for getting the debugger to work. (also in 10.1 which I have changed to meanwhile) :-)

! updating Eclipse managed to reproduce the problem. :-(

reverting the update --> debug works again.

installing plugin for Vault versioning system --> same old Rx Tx connection failure:

so right now seems like installing any kind of eclipse plugin or update breaks the debugger on my pc.

next is to try and see if the java runtime (jre-6u21-windows-i586-s) updated to v22, is the source of this bad situation.