Hi, In my jasper report there is a group header containing 4 field Name,Cover Number, Gender and Date of Birth. While executing the report I am getting the below error. Anybody came across this, Please help me to sort the same Error filling print... Error evaluating expression : Source text : $F{NAME}$F{Cover_Number}$F{DOB}$F{Gender} Setting up the file resolver... net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression : Source text : $F{NAME}$F{Cover_Number}$F{DOB}$F{Gender} at net.sf.jasperreports.engine.fill.JREvaluator.evaluateOld(JREvaluator.java:235) at net.sf.jasperreports.engine.fill.JRCalculator.evaluateOld(JRCalculator.java:573) at net.sf.jasperreports.engine.fill.JRCalculator.estimateGroupRuptures(JRCalculator.java:209) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportContent(JRVerticalFiller.java:290) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:148) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:909) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:822) at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:61) at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446) at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:276) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:745) at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:891) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) Caused by: groovy.lang.MissingMethodException: No signature of method: java.lang.String.call() is applicable for argument types: (java.lang.String) values: [821840016770] Possible solutions: wait(), any(), wait(long), split(java.lang.String), count(java.lang.String), find(java.lang.String) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:54) at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) at ChronicCompliance_1384066799566_198271.evaluateOld(calculator_ChronicCompliance_1384066799566_198271:353) at net.sf.jasperreports.engine.fill.JREvaluator.evaluateOld(JREvaluator.java:222)