The command interpreter has changed from weasis 2.6.0. Command containing special characters like '&' must be within quotes or double quotes. Example: dicom:get -w "http://launcher-weasis.rhcloud.com/weasis-pacs-connector/manifest?studyUID=2.16.756.5.5.100.397184556.14391.1373576413.1508&studyUID=1.3.6.1.4.1.5962.1.1.0.0.0.1168612284.20369.0.1&studyUID=1.3.6.1.4.1.21367.0.1.13.1021" It also depends of the command line system. For instance, in Eclipse the launcher parameters needs to escape get an escaped '&', so the command is: $dicom:get -w "http://launcher-weasis.rhcloud.com/weasis-pacs-connector/manifest?studyUID=2.16.756.5.5.100.397184556.14391.1373576413.1508\&studyUID=1.3.6.1.4.1.5962.1.1.0.0.0.1168612284.20369.0.1\&studyUID=1.3.6.1.4.1.21367.0.1.13.1021" |