Jasper Report + iReport + NetBeans 4

[stavera]

Si muchas gracias acabo de intentar la sumaoria, pero me sale el siguiente error: será que me puedes ayudar de nuevo
Errors compiling .\REPORTE 4.jasper! 96915*[Thread-15]*WARN*design.JRVerifier**-*Warning*:*Element*bottom*reaches*outside*band*are a*:*y=0*height=1*band-height=0 net.sf.jasperreports.engine.JRException:*Errors*we re*encountered*when*compiling*report*expressions*c lass*file: 1.*Syntax*error*on*token*"expression",*delete*this *token ****************value*=*(java.lang.Integer)(Custom *expression); ************************************************** *<--------> 2.*Syntax*error*on*token*"expression",*delete*this *token ****************value*=*(java.lang.Integer)(Custom *expression); ************************************************** *<--------> 3.*Syntax*error*on*token*"expression",*delete*this *token ****************value*=*(java.lang.Integer)(Custom *expression); ************************************************** *<--------> 3*errors ****at*net.sf.jasperreports.engine.design.JRJdtCom piler.compileReport(JRJdtCompiler.java:156) ****at*net.sf.jasperreports.engine.design.JRDefaul tCompiler.compileReport(JRDefaultCompiler.java:149 ) ****at*net.sf.jasperreports.engine.JasperCompileMa nager.compileReportToFile(JasperCompileManager.jav a:171) ****at*net.sf.jasperreports.engine.JasperCompileMa nager.compileReportToFile(JasperCompileManager.jav a:153) ****at*it.businesslogic.ireport.IReportCompiler.ru n(IReportCompiler.java:398) ****at*java.lang.Thread.run(Unknown*Source