"If we don’t get this logic update off the drive and into the machine by midnight," his manager grumbled, "the morning shift is just gonna be twenty guys standing around drinking lukewarm coffee."
Are you running the Program Transfer Tool inside a VMware or Hyper-V instance? The "exclusive" serial number algorithm can be confused by virtualized hardware IDs. Install the tool directly on the host OS (real hardware), not inside a VM.
Write down the PC name and Windows installation date on the paper license certificate. If that PC is decommissioned, you must legally "release" the exclusive serial number back to Fanuc’s pool before installing on a new PC.
To avoid downtime, follow these rules: