What you mean CAM? Is it CAM350 or anything else? Check for the rules in PADS and CAM. If possible - post here example. The other possible reason is D-codes - may you didn't regenerate them or you didn't make "Draw to Flash" in CAM product. Please for more information to be able to help you.
CAM is CAM. Under "File", there's "CAM", and that's where the Gerber files are generated-it's not a separate product, it's part of PADS Layout. There's not (as far as I know) a separate Design Rule definition for CAM (it wouldn't make sense, really).
WIthout more info it is hard to say, but the only reason I could see where you might see a difference from PADS Verify Design and running CAM is planes.
If there are planes in the design and you did not run plane check everytime you run CAM you will be asked to run pour manager and there might be errors there from Plane Check even though Clearance & Connectivity won't have any errors.
My only thought based on information given.
In Pads Layout, setup\LayerDefinition, for plane layers, you can assign nets to each plane. The CAM Plane check looks to see if you have nets assigned to a plane but did NOT assign ALL of them to an area on that layer. It can be some what of an elusive error.
You didn't get burned by DRC only running on the current view and not the entire PCB did you? make sure the entire PCB is on the screen when you run DRC.
What error message are you getting from CAM?
Okay, folks, here goes. Thanks for all the suggestions; by putting them all together in a blender, I think I've found my problem(s)
1) I have multiple planes with duplicates of some of the nets on multiple planes. So, I would end up with plane islands on one plane, but it didn't matter to me because connectivity would be made on the other plane
2) When you run the "Connectivty" check, it verifies that all signals are connected, without regard to which plane they make that connection on. BUT, when you run the Plane check, it looks for islands and flags them as an error. (This was my main problem)
3) I have two separate planes on one layer assigned the same net. They are joined together on a different layer. But, when I ran the Plane test, it saw the two separate planes as an error. The only way I can get the error to go away is by adding a "dummy" trace connecting the two planes.
Thanks to all for helping me to see the light.