I try to implement my own java functions into the Jaspersoft Studio v6.0.3 like this tutorial: http://community.jaspersoft.com/wiki/jaspersoft-studio-expression-editor-how-extend-it-and-contribute-your-own-functions-part-2-0 , but i always get the following error on report-preview:
If i change the report language to java (i read this in another post) i get these errors:
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