Cant fill report after using Jaspersoft Studio

[schakkalakka]

Hi,

I started with iReport 5.5.0 and switched in the last few months to iReport 5.6.0.
After upgrading my java-Re from 7 to 8, I noticed that iReport won't run with java 8.
Thats why I started to play around with jaspersoft studio 5.6.2. After a few changes, I switched back to iReport.

Now I cant compile the reports in the iReport.
Even after converting from .jasperfiles via iReport I couldn't compile them.

I changed almost all stuff jaspersoft studio wrote in my files, but I'm still getting the error below. What am I missing?

Error filling print... net.sf.jasperreports.engine.JRException: Error loading object from InputStream

net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error loading object from InputStream 
    at net.sf.jasperreports.repo.SerializedObjectPersistenceService.load(SerializedObjectPersistenceService.java:63) 
    at net.sf.jasperreports.repo.SerializedReportPersistenceService.load(SerializedReportPersistenceService.java:43) 
    at net.sf.jasperreports.repo.DefaultRepositoryService.getResource(DefaultRepositoryService.java:155) 
    at net.sf.jasperreports.repo.RepositoryUtil.getResourceFromLocation(RepositoryUtil.java:136) 
    at net.sf.jasperreports.repo.RepositoryUtil.getReport(RepositoryUtil.java:107) 
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateReport(JRFillSubreport.java:349) 
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:382) 
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:307) 
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:259) 
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:456) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillBandNoOverflow(JRVerticalFiller.java:467) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillPageHeader(JRVerticalFiller.java:431) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:292) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:152) 
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:963) 
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:892) 
    at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:114) 
    at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:584) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:930) 
    at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:928) 
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572) 
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) 
Caused by: net.sf.jasperreports.engine.JRException: Error loading object from InputStream 
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:253) 
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:233) 
    at net.sf.jasperreports.repo.SerializedObjectPersistenceService.load(SerializedObjectPersistenceService.java:59) 
    ... 21 more 
Caused by: java.io.StreamCorruptedException: invalid stream header: 3C3F786D 
    at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:804) 
    at java.io.ObjectInputStream.<init>(ObjectInputStream.java:299) 
    at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.<init>(ContextClassLoaderObjectInputStream.java:58) 
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:248) 
    ... 23 more 
Print not filled. Try to use an EmptyDataSource...

 

Edit: Changed title, can compile it, but not fill it.

I'm using a JSON-datasource I used already used without any problems in iReport 5.5.0 and jaspersoft studio 5.6.2.