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When I design a Bar3D report and then preview it , errors happened! plz help me!


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I was designing a Bar3D report in studio, and the datasource is mysql,just a very simple report, but when I click the "Preview" button, errors happened as follows:

net.sf.jasperreports.engine.JRException: Too many groovy classes were generated.
Please make sure that you don't use Groovy features such as closures that are not supported by this report compiler.

who knows why?plz help me~~~

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