The build of the sample web app does not work out of the box.
If you go to the folder samples/SampleWebApp and type ant it will bomb out with path not found problems.
To fix this all you have to do is delete the nbproject/private folder.
The private folder is created on the fly by netbeans and should not be check into the version control system.
Found in JI 1.2.0 on Ubuntu. Error message is
build-impl.xml:419: Warning: Could not find file /home/manfred/javadev/resources/jasperintelligence/jasperserver-1.2.0-
activation-1.1.jar to copy.
Total time: 1 second