Well, I see you posted this in 1999 so I don't really expect anyone to see my response, but I just encountered this problem myself.
The reason URL Get HTTP Document sometimes doesn't time out is that is it very poorly written. Several of the subVIs strip out the timeout error using VI "No Time Out Error". This can cause the VI to be stuck in an infinite loop in several different locations. For example, TCP Write Entire Buffer has a tight while loop that runs until the entire buffer is sent or an error <i>other than a timeout error</i> is encountered. If a timeout error is generated (for example, the by remote http server dying in the middle of the transfer), this routine ignores it and just keeps trying to send data forever. It's really dumb. Right now I'm trying to decide if I should modify NI's existing routine, junk it and start from scratch, or go outside of Labview entirely and call some Microsoft API function. I'm using Labview 6.1. -Rob
