Smart Stairs has produced an unhandled runtime exception - this shouldn't
have happened - but it did...
All instances of Smart Stairs have been shut down in
order to prevent further issues.
Please backup your actual document and restart Cinema 4D.
Until then, you won't be able to work with Smart Stair
instances anymore...
If you would be so kind to send us the smartstairs_errorlog.txt file, we would be able to track down the bug and fix it asap.
To locate that file, go to Edit ->
Preferences..., click the Open Preferences Folder... button
and enter the /plugins/ folder.
Please send that file to info@smart-page.net
Hint: If you don't want to go through all that hassle with locating the smartstairs_errorlog.txt, you could also just copy the content of the console dialog that just opened (right-click on the text -> select 'Copy all') and paste it into the mail - thanks a bunch!