The plug-in is null : problem in an eclipse plug-in

when I try to test my plug-in I'm getting this weird problem as shown below:

Activator.getDefault()   // returns null here

Any clue h开发者_Go百科ow to fix it?

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Pretty much sounds like your plugin is not activated when you call #getDefault. Did you check "Activate this Plug-in when one of its classes is loaded" (aka "Bundle-ActivationPolicy: lazy" in MANIFEST.MF) in the manifest editor ?