[MonetDB-users] Installation Problems

Ying Zhang Y.Zhang at cwi.nl
Mon Sep 22 16:51:13 CEST 2008

Hello Scott,

First of all, thanks for trying MonetDB.

On Mon, Sep 22, 2008 at 07:46:28AM -0500, Scott Stephens wrote:
> I've been attempting to install MonetDB by compiling the Aug. 2008
> superball.  My system is 64-bit linux, specifically the Ubuntu
> Intrepid Ibex alpha .  It appears that the installation is failing
> while compiling the JDBC driver, with the error message:
> java.lang.UnsupportedClassVersionError: Bad version number in .class file
> I'm using the Sun Java 1.5.0 JRE and JDK.  You can look at my full
> installation log here:
> http://docs.google.com/Doc?id=dhqbmd8x_6fqdnn7c3
> Can somebody help me out?  I'm hoping I've just made an easily
> corrected newbie mistake, but I'm out of things to try.

This looks like you have multiple versions of java/javac installed on
your system. 'ant' might be using a different java compiler than the one
'javac' in your path (but I unfortunately don't know how to find which
javac ant is using...).
Can you maybe search for all java versions you have, and
remove/disable all but one version?

Kind regards,


> Thanks,
> Scott

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