Project Properties - Uncaught .class file

General Discussion
1

We upgraded our Ignition Software to the latest and now I can not modify my project’s properties. I get a “Uncaught Unsupported Class Version Error: Bad version number in .class file”. Has anyone seen this or know how to fix it?

Thanks!

2

No, we haven’t seen this, but you need to post more of the error for us to be able to track it down. If the pop-up box gives you the option to send the error to us, that will work, otherwise go to Help>Diagnostics>Console and copy everything there into a text file.

If the error is on the gateway, sending us the “wrapper.log” file in the install directory should work.

Attach the files here or send them to support@inductiveautomation.com

Regards,

3

I did both. Send error and here’s my console dump:

[quote]ERROR [ErrorUtilAWTExceptionHandler-AWT-EventQueue-0] Uncaught UnsupportedClassVersionError: Bad version number in .class file
java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
[snip][/quote]

4

Thanks. We did actually get an error report similar to this recently, we’ll look into it tomorrow.

Regards,

5

This was due to a build system error on our end compiling part of the mobile module against Java 6. It would only show up if you run the Designer under Java 5 - does this sound accurate to what you’re observing? Try running the Designer in Java 6 and see if the error occurs.

We’ve fixed this for the next release.

6

How do I select which Java the Designer runs?

Here are my Versions:

Ignition Platform: 7.2.3
SQL Bridge module: 5.2.3
Vision module: 4.2.3
Mobile module: 1.2.3 (trial)
Reporting Module: 1.2.3
Java Version: Sun Microsystems inc. 1.5.0_14

7

Right, so your Java is version 5. You may not have 6 installed. If you go install it (java.com), it should update everything automatically. Try that, and see if you still run into problems.

Regards,