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Would I get help with RAD 7.5?

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Good morming,

I am running RAD 7.5 on WAS7 and JRE 6. I am running s small problem, and I am struggling with the error exception which I received from running the program. The error is the following :
java.lang.UnsupportedClassVersionError: org/eclipse/emf/ecore/resource/Resource$Factory$Registry (Unsupported major.minor version 49.0)
I don't know what the error meant since the program was running ok in WAS 6, but when I ran it in WAS 7 then it gave me the error exception.

I am not sure if I need to install JDK 7 or JRE 7 in order to fix the error. So I am welcome any of your advices and suggestion.

Your help would be appreciated.

Consider Paul's rocket mass heater.
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