ireport - How can I know What Error is happening to my jasper report -

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ireport - How can I know What Error is happening to my jasper report -

i've been using jaspersoft ireport generating reports java program. noticed when create study using ireport, , error happens, there no clue, can find out going on ? there window study problem window, window blank. cannot find out error , study not compiling.

jasper-reports ireport

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