Try it again.  If it keeps happening, reinstall VWD.

After the first occurence, I uninstalled the product, then downloaded it from the web and did a reinstall.
I know the .aspx and .vb code is ok since they do run on a remote server.
Reintalling for the third time might work but I wonder if there are any other alternatives?
BR

  Bob 

Without knowing the cause of the error, it's very difficult.  It could be VWD, or it might even be faulty memory on your machine or any number of things.  Once you have tried the reinstall a few times, and still get the error, it's less likely to be VWD....