Are you trying the latest version from labs?
Preview 2 was released on labs recently : http://labs.adobe.com/technologies/captivate_html5/.
I have the same issue. I downloaded the preview 2. I have a win7 laptop and am running Captivate 55. When I try to load simple output, just simple and short screen recording, I get teh 1069 error.
I was getting this error consistently, but when I moved my project into a folder path with no spaces, I was successfully able to load the swf. I'm sure this isn't the issue in all cases, but it's worth trying. Good luck.
same for me,
I thought I did not launch the 'run as administrator' but this is not the problem neither...
It is written exactly this: Some Actionscript error has occured.: Error #1069
I would think this might be related to an specific actiivty or a quiz added in the course that still cannot be converted...?