It is not good for IPW recognition.
I am working on the following.
First, we created tool path with 1 stock value by CAVITY MILL OPERATION.
* Tool : 17 Dia 1Radius , Stock : 1,
Secondly, we have created Tool Path with 0 Stock as Rest Mill OPERATION.
* Tool : 12 Dia 1Radius , Stock : 0
I copied the REST MILL OPERATION.
And I divided the Rest Mill operation into a divide.
And I removed the divide operation(REST_MILLING_DIV_1) that was added.
I have generated a REST_MILLING_COPY that I COPY before.
Not recognize IPW for deleted process after divide.
How do I recognize and create it?
I can not tell much about hte error message but if you work with divide tool path it is suggested to work with 3D IPW and not use leve based IPW. Please give it a try.
Are you trying to just cut the bottom half? if so, try using cut levels.