The Fadal control does not allow the N# to exceed the largest number of 99999. The Fadal will give the message: ERROR N WORD EXCEEDS 99999. This typically happens with large programs that are being DNCed to the Fadal control.
There are a couple of work arounds for this:
First option, line numbers are not required during DNC. Post a large program without the N# in the file that is going to be DNCed.
Second option, is to have the CAM post to reset the N# back to N1 when the maximum of N99999 is reached.