had this pop up a couple of times can anyone shed any light 
many thanks chris
That looks like a write permission issue!
You have tried it again, now, try another location ([menu]File->Save As) or other name and close SketchUp.
These issues could derive when other applications like OneDrive tries to sync and hijacks the file.
Check if you have full permission in the Windows explorer (rightclick on the folder, properties tab)
Normally it should be ok, but something might have changed that)
Try to repair your installation of SketchUp:
Find the installer file or download it again, rightclick on it and choose ‘Run as Administrator’
When asked, choose repair.
You need to be logged in in your normal user account.
2 Likes
Do you know why I get this message ?
I have tried what you said in this previous message but didn’t work.
Any help would be welcome.
Thanks
Save the file directly to your computer not to icloud. Also remove the parentheses from the file name.
Thank you. I removed the parentheses and it seems to work now