Hello cutter. It is possibly ZW/VX that is creating the problem, you should be able to spot it in the CL output file if that is the case. Identify the operation and in the CamPlan tree click on the Op's Parameters branch - take a look at the Speeds-Feeds table for the op. I have seen ZW/VX unexpectedly use a value such as Slotcut. A way to detect odd behaviour like that is to set the feed values to something instantly recognisable in the output file. Once you can see the offender, you can set it to a reasonable value in the VX table.