DCMTK

In case of a network error such as...

E: Association Request Failed: 0006:031b Failed to establish association
E: 0006:0317 Peer aborted Association (or never connected)
E: 0006:031c TCP Initialization Error: Connection refused

... findscu returns with exit code 0, which is certainly not what a user expects (e.g. when starting findscu from a script).

The reason for this (wrong) exit code is that the "cond" variable is not evaluated after calling "cond = findscu.performQuery(...);". Also the return value of dropNetwork() and other methods is not checked to set the exit code.