[Pellet-users] addInverseProperty() exception

[Tiziano Furlan]

Hi,

I'm receiving a NullPointerException when using the KnowledgeBase method 
addInverseProperty(p1, p2) on RBox.java at line 292.

Both the properties I'm passing to the addInverseProperty() exists, but 
it seems that the roleS.getInverse() method on RBox.java returns null.

I'm using the 1.5.1 release.

Any idea on how to solve this problem?

Thanks

Tiziano