iReport: getting "Incompatible java.math.BigDecimal value assigned to parameter" exception

I am developing report containing sub report using iReport and i am passing two external parameters in master report: the CurrWeek and CurrYear parameters. I'm passing the same parameters to the subreport.

In both reports I declared parameters as BigDecimal. When i run the report it shows the error shown bellow:

   Error filling print...
        net.sf.jasperreports.engine.JRException:
     Incompatible java.math.BigDecimal value assigned to parameter 
    CurrWeek in the WeeklyReportForOtherWeek dataset. 
     net.sf.jasperreports.engine.JRRuntimeException: 
     net.sf.jasperreports.engine.JRException:开发者_如何学JAVA 
     Incompatible java.math.BigDecimal value assigned to parameter 
     CurrWeek in the WeeklyReportForOtherWeek dataset.

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This error mean that you pass wrong type from dataset to parameter.

Look at the place where you are creating (filling) dataset.