Yeah, the performance is inconsistent, sometimes they import out of order.   You could try running this macro for importing all the operations from a file using netscripting.dll included with mastercam 2022 . I attached it as a text file as well. I haven't had any issues importing this way.. //#r"C:/Program Files/Mastercam 2022/Mastercam/NETHook3_0.dll" using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.Dr