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Unsupported major.minor version 48.0 [message #77983]

Fri, 18 July 2003 13:55

Eclipse User

Originally posted by: karikday.yahoo.com

While building my project (after successful javac), I get the following
build error: sun/rmi/rmic/Main (Unsupported major.minor version 48.0).
I've read several other threads on several sites regarding this error,
everyone indicating that this problem is caused by 1.3.X to 1.4.X class
file compatibility. All of the source I'm working with is being compiled
and run against 1.4.1. Within eclipse my compiler compatibility is set to
1.3. Can anyone make any suggestions??

Strange piece of information... I was compiling and running this project
yesterday. Today I can't get it to build. The only thing that has
changed is java source.

KD

Re: Unsupported major.minor version 48.0 [message #78125 is a reply to message #77983]

Fri, 18 July 2003 16:30

Eclipse User

Are you using the RMI plugin?

This can happen in two cases:
1. you run eclipse using JDK 1.3.1 (use -vm argument to eclipse.exe to
fix it)
2. you have incompatible tools.jar. You should go to the project's RMI
properties and select the "tools.jar" file from jdk 1.4.1 directory.

Genady

Kari Day wrote:

> While building my project (after successful javac), I get the following
> build error: sun/rmi/rmic/Main (Unsupported major.minor version 48.0).
> I've read several other threads on several sites regarding this error,
> everyone indicating that this problem is caused by 1.3.X to 1.4.X class
> file compatibility. All of the source I'm working with is being compiled
> and run against 1.4.1. Within eclipse my compiler compatibility is set to
> 1.3. Can anyone make any suggestions??
>
> Strange piece of information... I was compiling and running this project
> yesterday. Today I can't get it to build. The only thing that has
> changed is java source.
>
> KD
>

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