

Hi, I am trying  to fit a "Area-Interaction" point process model to my data consisting of log-landing locations in a forest. I get the following warning message alongwith the result of the fitting: "1: In countingweights(id, areas) :
  Some tiles with zero area contain points
2: In countingweights(id, areas) : Some weights are zero" Could you please guide me as to what error this message indicates? Thanks!                		 	   		  
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