Installation & update
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Can't "re-open" a AC10 file in AC9...

Anonymous
Not applicable
I accidentally opened a AC9 file in AC10 and then saved. When I try to re-open in in AC9 it gives me the attached error.

What can I do?
2 REPLIES 2
Do you see an .LCK file in the file directory? If so delete it and re-attempt.
Think Like a Spec Writer
AC4.55 through 27 / USA AC27-4060 USA
Rhino 8 Mac
MacOS 14.2.1
You can also try saving it back to AC9.0 format under "Save As" and selecting the AC9.0 format option.
Richard
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Richard Morrison, Architect-Interior Designer
AC26 (since AC6.0), Win10