Afternoon all.

We recently upgraded all the workstations here at the college, We uninstalled the previous version then put version 16-17 onto the machines.

one problem that's just reared its head is the "Invalid argument" when I open the files I was teaching from last year. It then hangs SW and I have to end process it away.

I have purged my temp folder as one forum member suggests but I am at a loss as to what's gone wrong here.

I notice that the latest version doesn't allow you to have intersecting drilled holes and I wondered if that was one issue... "Zero thickness"?

If someone can help I would appreciate it - I have no Admin rights here either...

Thanks

Matthew Bridge.