Parting line Analysis

Hello,

I have some problem. What can be a reason that this tool is not active in the tool menu. s dark. Only this icon is not availeble to press.

Is no matter or this is igs file or prt made in Solid works. Should I try to set it up in options? Please help. I have SW 2013 & Win 8.

Thank you

SolidworksPlastics And Mold Design