I run into a problem when trying to post process an optimized program group (below).
As can be seen in the above picture, under the program group of CHMFRMILL_OP1, there is operation CHAMFER, several S1H_CHM_L and S1H_CHM_M. After optimizing the group, all the operations except CHAMFER were optimized and an optimization group OPTIMIZED_NC_4 was created. See the operations below. The first picture is operation CHAMFER, the second is the optimized group.
When I postprocessed the group, I can see a tool change between operation CHAMFER and OPTIMIZED_NC_4, although all the operations under this program group use the same tool. This happended even when I posted with OOTB post processor.