I am getting an error "unknown hyperlink target 0" when I try to run a Jasper Report
I don't know if this is the only reason this error would happen, but in my case, I compiled the report with iReport-3.7.3, but the software I am using to run the report uses jasperreports-3.6.2.jar. Once I replaced the jar file with jasperreports-3.7.3.jar, the report ran happily. It turned out to be a version incompatibility.