sPSActionControl->SuspendHistory CRASH

Hello, I'm building a plugin for Mac OS X and Photoshop CC 2014.

I'm trying to run the Automation Pluggin Example and this crash in the next function.

  sPSActionControl->SuspendHistory(reference.get(),

  ::Execute,

  this,

  nameAsZString);

I think that sPSActionControl is null, but I'm not sure.

Please can you help me??

Thanks!!