Hi Richard
This may not be relevant to you anymore but i started getting this error and when googling i found a spanish (i think) thread that suggested the issue was in the save path – saving it to a location with a smaller path fixed it.
Example:
“c:\some really long folder name with spaces in it\video.flv”
fails to export but
“c:\some folder\video.flv”
exports just fine.
Regards
Nick