I was having someting similar but different error message. After reinstalling flex the issue was gone.
If you have another pc, try to install flex and copy your project and test and see if you have the same error.
I hope this help.
Yes I already tried to install on couple of other PCs. The same installer works perfectly fine. Looks like there is a problem with Vista. Any clue ???
i don't use vista, sorry I can't help much.
Maybe disable user control and turn the firewall off, uninstall all, reboot the pc, reinstall flex and see if that works.
this looks like a wonderful error from Eclipse.
Eclipse is the buggiest part of the FLEX IDE (if you use SVN).
I am assuming you are using Eclipse/SVN? Have you tried updating the Eclipse plugin?
jfb, I tried all that but to no avail.
Devtron, am not using SVN ! I'm using the Flex Builder standalone version.
Thanks guys for your replies. I just ran out of patience and just started working with FB4 and all is going great !