G72 problem

[gcodeguy]

Haven't had an opportunity to check it out myself, but the owners says G71 works, but G72 gives error 65. Something about a G-code missing, except it isn't missing...so he tells me. This is on an older Daewoo Puma 8 with an O-T control. It is the same lathe that had a bad threading parameter. Thanks to help on here, I was able to find which parameter on the threading cycle was set wrong, and get the cycle to work properly. I am hoping it is a similar problem with the G72 cycle. I looked for a manual on the O-T control tonight, but didn't find one. Do have one at my day job.

Control uses one-block cycles. Thanks.