I tried to open the file and it came through fine. see attached image.
I have CS6 Master collection and SW2013 on 64bit Win 8. Looking at the knowledge base it seems that the issue is to do with 64bit.
Make sure you have both 32bit and 64bit versions of AI on your system so that SW can use that for the conversion.
CS6 Master collection auto installs both versions which is why it opened fine on my machine.
I have this exact same problem. Is there any way to Bump this topic to see if there are any solutions? I think that this must be a check box on one of the two pieces of software that will solve it.
Additionally, I originally only had 64 Bit Illustrator installed and it had the error message that went something along the lines of "You must have CS3 or higher installed" After reading some forums I installed 32 Bit illustrator too and then the problem changed to being the same as the one above.
Does anyone PLEASE have any ideas - I am stumped!!