[rules-users] java.lang.NullPointerException when using a custom operator

[Hezi Stern]

Hi all,

 

I have been working with Drools 5.2.0 on windows xp and I have a stable
project.

I upgraded to windows 8, drools  5.5.0 and upgraded to eclipse Juno (from
Helios).

 

I have  now encountered a strange problem with my existing drools project. I
have a accustom operator called supersetof which now results in the
following error reported in the IDE in any file where the supersetOf is used
(LHS):

 

Error: java.lang.NullPointerException 

 

After receving this error the drools parser does not work, hence this is the
only error I have. 

 

I have tried to use the Drools 5.2.0 again (on the new windows 8 machine)
but I get the same problem so I guess it has to do with some IDE\eclispe
configuration or compatibility issue.

Obviously not the drools project code as I have not made any changes to the
working project.

 

I did make sure the custom operator is configured similar to the way it was
on my previous computer. 

 

Any ideas? Is there a different configuration for Juno?

 

Thanks,

Hezi

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