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Java version giving incompatibility

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Hello friends, I'm new with the jasper tool, and I'm having some problems, I have several reports here, which are working, but I have one here, which uses a sub-report, but when I ask to generate it, it returns this error:

Exception on "main" thread net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Class not found when loading object from InputStream.

compiling with jasperstudio works, but when I compile with phpjasper it gives an error.


I believe it's a problem with incompatibility with java, but I'm already using the newest version of jdk

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I assume you are using the latest version of JasperReports library which does indeed support any JRE versions from v. 6.
If your PHP app is able to run jasper reports nicely and it only fails for reports embedding sub-reports then I would check that the master report points to the right location to find the sub-report .jasper or .jrxml file once deployed in your app.

I hope this helps

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Yes, I'm at version 6.20.5, and my jdk version is this:

java version "1.8.0_371"
Java SE Runtime Environment (build 1.8.0_371-b11)
Java HotSpot 64-Bit Server VM (build 25.371-b11, mixed mode)

and my subreport's call is this:

<band height="306" splitType="Stretch">


<reportElement x="0" y="0" width="509" height="70" uuid="e54ebdae-686d-4023-91f2-e0ca8e043b4e"/>

<subreportParameter name="REPORT_CONNECTION">







And yes, my subreport directory is correct, I already confirmed it.


I added an image in attachment, in classpath do I need to add the jdk path of my machine?


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  • 3 weeks later...

I would try to remove the jasper file of the subreport and recompile it with the same compiler you used to compile the master report.
Be aware that Jaspersoft Studio may not always compile the subreports for you, or simply it does not do it if it is not necessary (i.e. the jasper is up-to-date respect to the jrxml).

Since phpjasper will be your running environment, I would use it also to (re)compile all your jrxml files.


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Another possible error could be the way you are referencing the subreport:
You should point to the jasper file, not to the jrxml file (which is the source that needs to be compiled into a jasper file).

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