You can actually encounter two kinds of errors ... 1) "Error reading resource ..." 2) "Could not parse mapping document from resource ..." Ensure that you have the right hibernate3.jar file (ireport2.0.3 ships with hibernate jar from 3.0.5). Changing the hiberante3.jar from the 3.2 version seems to fix the first error. For the second one, try adding the classes directory (where the java classes that are mapped are found) to the CLASSPATH setting in iReport (Options->Classpath). -- Zac George