When attempting to run a new report in Jasper Studio, the preview fails with the following error:
java.lang.ClassNotFoundException: byte cannot be found by bet.sf.jasperreports_6.3.0.final
After selecting or adding the fields to the reports, one of the fields type of data was incorrectly selected instead of java.lang. DATA_TYPE, it was added byte, this type of data does not allow the report to ran since it is a not valid.
Jasper Studio 6.3.0 or above
1. Open Jasper Studio and select the report with the issue.
2. in the fields folder on the bottom left, make a right click on the field and select Properties, this will birng the properties window on the right.
3. Verify the "Class" field if it has byte change it to java.lang.String.
4. Save the changes and test the report preview.