Yes, the vector lines should all point toward the spindle. However, Allan's point is that it causes a problem if any of the vector lines are absolutely vertical. The post needs any angular value other than zero to be able to make the correct calculation. I have encountered this exact same situation and Allan's solution definitely works.

The warning is coming from your post processor. Most likely that one or more of your tilt lines are pointing straight up in Z. This causes an issue where the 2 rotary axis become co-linear http://en.wikipedia.org/wiki/Gimbal_lock The solution would be choosing tilt lines that are not vertical. HTH Allan

At least it was caught at the post. I have had this issue before... the solution is to make your fixture so that it holds the part on an angle (say 10 degrees) to the rotary platter... that way, the tilt lines you choose are not pointing straight up through the Z-axis. This way, those pesky singularities are avoided.

Ya, but do you really think his girlfriend wants a ring that says J Paris inside?

There is a method to manually registering the swdocumentmgr, Ryan on the Mastercam forum posted this in the industrial forum. Select "Start" In the search line type CMD but do not click enter Instead right click on CMD.exe and select "Run as administrator" This will open a command prompt that says Administrator on the title bar Next type the following string, don't forget the " " around the path: C:\Windows\syswow64\regsvr32.exe "C:\program Files\mcamx8\common\sworksdata\swdocumentmgr.dll" Press enter and verify you get a succeeded message The SWorks file you're working with isn't a SWorks 2015 file is it? If that is the case I would suggest reading the thread on the Mcam Industrial forum.