Error:1 G-code words....Burn stops after a few seconds with error

[Rollddice (Dwayne)]

After upgrading to Lightburn 2.0.05 on my Lenovo Windows laptop, when buring a new image the laser stops after a few seconds with this error…
Error:1
G-code words consist of a letter and a value. Letter was not found.
Any old .lbrn2 files with an image works fine.

[MikeyH (Mike Hembrey)]

Check the GCode Clustering switch. It should be off.

[Rollddice (Dwayne)]

Thanks Mikey! That worked, why would that have been turned on, do you know? Cheers

[MikeyH (Mike Hembrey)]

One of those mysteries of the Universe.

The only safe upgrade includes installing a .lbprefs file dated before the update.