Select the operation that you what do prevent from regenerate.
Klick right mouse button and select: "Tool Path" > "Lock"
Now the Operation is Locked up and prevented from manipulation.
If the geometry changes or something forces NX to regenerate the OP, a warning is created
After that is is necessary to accept the tool path without regenerate.
Klick right MB on the locked OP and select "Object" > "Approve"
Toolpath is alive again
Have you checked the context menu of the operation in the operation navigator?
There are options to lock a tool path.
To suppress the tool path, you just need to delete the internal tool path and keep the operation.
To delete a tool path use the delete menu entry, which is the fourth below the lock entry in the image above.
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