Can't Upgrade to 7.9.x TS-219, Doesn't Recognize Tarball

> When I use SSOTS 4.14 it lets me upload the linux arm tarball but when I
> go to install a "Error: Can't determine what we just extracted" is shown
> and it suggests trying a different tarball. I've tried 3 with no
> success.

There are other threads about this. You have to patch some script in
SSOTS, as it does only accept LMS up to 7.8.x. Search for SSOTS and your
error message.

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Michael