OOpps...sorry I thought I posted once, Thanks you.

There are a number of causes for this. Most common appear to be materials. I'd advice you to check out the ASGVis forum where you will find a sticky that describes how to get hold of the error log. Then you can submit that error log and model to ASGVis support. Just in case you have come across a new issue.

and sketchup does not have a built in renderer either.