I can't build the .jasper file,who can tell me the reason. E:\jasperreports\demo\samples\alterdesign>ant compile Buildfile: build.xml compile: BUILD FAILED E:\jasperreports\demo\samples\alterdesign\build.xml:27: taskdef A class needed by class net.sf.jasperreports.ant.JRAntCompileTask cannot be found: org/apache/tools/ant/taskdefs/MatchingTask Total time: 1 second Post edited by: cnjun, at: 2006/08/19 06:37