I just try to upgrade the Blueprint 5.1 with SP 3.1. Unfortunatelly the upgrade process is finishing with that error
"System Exception: Upgarade Scout failed with exit code 102,
I tried to run installation of the Tracker on the server and have got info "Installer has detected that you are running Citrix or Terminal Services. This is not supported for a Print Scout print server installation. Workstation mode must be specified"
I noticed similar info during upgrade fro exmaple from BP 4 to 5, but this could be solved by switching the terminal service mode to install, using in CMD this entry "Change User /Install". Unfortunately it doen't work this time.