[protege-discussion] Merge Ontology

[Natasha Noy]

Raj,

No, it shouldn't take too long to compare 50 concepts -- it should be  
virtually instantaneous. Something else is going on.

Could you please be more specific on the steps that you are performing.

> after selecting the 3 ontologies (A and B to be mapped to C) and  
> performing merge operation (by pressing the 'click here to begin'  
> button), I get the exception in my console:
>
> Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
> 	at  
> edu.stanford.smi.protegex.prompt.MappingKnowledgeBase.performSaveMerge 
> s< Unknown Source>
> 	at edu.stanford.smi.protegex.prompt.PromptTab$1$1.run<Unknown Source>
> 	...
> 	...

It appears that you are specifying C in the third field on the Prompt  
tab. Are you? That field is for  the mapping ontology, in case you  
have performed the merge before, saved the state, and want to replay  
it again. If you are doing it for the first time you need to:
- open C
- specify A and B in the first two fields on the Prompt tab
- leave the optional field empty.

Let us know if this works for you.

Thanks,

Natasha