Hello,
If the model is created a cam data in inventor, the cam tab will show automatically next to the model tab.
And if a model hasn't any cam data before and now, the tab will not be show, the tab automatically disappear.
I tested when the model was created a cam data before, and the data delete now.
But the cam tab still show automatically, it can be confused.
So If the cam data delete in inventor, the cam tab have to show optionally.
The option need to create in inventor or inventor cam.
Please vote if you agree with the above case.
Thank you.