DCMTK

echoSCU returns a false positive (EXITCODE_NO_ERROR) while sending a number of C-ECHO-RQ messages to another DICOM application through an established network connection.

The error happens if the condition returned by cecho is not:
DUL_PEERREQUESTEDRELEASE nor DUL_PEERABORTEDASSOCIATION

The program logs the error correctly(Echo SCU Failed:...) and the association is aborted, however, the program only returns an accurate exit value if the association abort also fails.