net.sf.jasperreports.engine.JRException: Report design not valid : 1. Class interface not supported for subreport data source expression. Use instead. at net.sf.jasperreports.engine.design.JRAbstractClass Compiler.compileReport(JRAbstractClassCompiler.jav a:77) at net.sf.jasperreports.engine.design.JRDefaultCompil er.compileReport(JRDefaultCompiler.java:129) at net.sf.jasperreports.engine.JasperCompileManager.c ompileReportToFile(JasperCompileManager.java:127) at net.sf.jasperreports.engine.JasperCompileManager.c ompileReportToFile(JasperCompileManager.java:109) at net.sf.jasperreports.ant.JRAntCompileTask.compile( JRAntCompileTask.java:398) at net.sf.jasperreports.ant.JRAntCompileTask.execute( JRAntCompileTask.java:252)

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Report design not valid : 1. Class interface not supported for subreport data source expression. Use instead. at net.sf.jasperreports.engine.design.JRAbstractClass Compiler.compileReport(JRAbstractClassCompiler.jav a:77) at
net.sf.jasperreports.engine.JRException: Report design not valid :

1. Class interface 
 not supported for subreport data source expression.

Use 
 instead.

at net.sf.jasperreports.engine.design.JRAbstractClass Compiler.compileReport(JRAbstractClassCompiler.jav a:77)

at net.sf.jasperreports.engine.design.JRDefaultCompil er.compileReport(JRDefaultCompiler.java:129)

at net.sf.jasperreports.engine.JasperCompileManager.c ompileReportToFile(JasperCompileManager.java:127)

at net.sf.jasperreports.engine.JasperCompileManager.c ompileReportToFile(JasperCompileManager.java:109)

at net.sf.jasperreports.ant.JRAntCompileTask.compile( JRAntCompileTask.java:398)

at net.sf.jasperreports.ant.JRAntCompileTask.execute( JRAntCompileTask.java:252)
	at org.apache.tools.ant.Task.perform(Task.java:341)