An error message is received when generating a milling operation.
This dialog only includes an 'OK' button, with no option to view the exact warnings in the info window.
The dialog does say to list the path to see the problems, something similar to:
---------- Diagnostic Information ----------
---------- Object Name: GROOVE_MILLING ---------------
Warnings were produced during tool path generation.
List the tool path to see the location and details.
Solution
As noted in the general warning message, the tool path listing will report the problem points right in the path. The warnings indicate that some points in the path are below the Lower Limit Plane, i.e.
FEDRAT/IPM,10.0000
GOTO/4.7500,-1.7458,0.9250
PAINT/COLOR,31
GOTO/4.7500,4.6614,0.9250
PAINT/COLOR,37
GOTO/4.7500,5.6614,0.9250
$$ WARNING POINT IS BELOW LOWER LIMIT PLANE
PAINT/COLOR,211
RAPID
GOTO/4.7500,5.6614,2.5000
$$ WARNING POINT IS BELOW LOWER LIMIT PLANE
PAINT/COLOR,186
RAPID
GOTO/4.7500,-2.7458,2.5000
PAINT/COLOR,211
RAPID
GOTO/4.7500,-2.7458,0.8000
This is due to having a lower limit plane defined in the parent MCS. The operation is producing tool location points in the path that are below this lower limit, so NX is giving the warning. To resolve this, simply edit the Lower Limit Plane in the active MCS parent and reset this back to the 'None' option to disable this parameter (or adjust the existing lower limit plane downwards until the path will all be above it in space).
Notes