The title basically says it all. I am trying to run an external flow simulation on a contra-rotating propeller system and when I get to the "Analysis Type" step in the wizard the Rotation check box is simply not there. I have looked around but can not seem to find a solution even though I have a feeling it's right under my nose. Also I already tried reinstalling to no avail.

One more thing to note is that it runs on a team mates laptop with the option for rotation there.

Thanks ahead of time for any help.