>>Anyway, I restarted my PC and going to re-try. If it would not work, I have other things to work on, I would put this particular page aside for the time being - I'm already quite depressed with it not working for no apparent reason.
>
>Well, the key question is usually, "What changed?" - I tend to rely on source control to help me answer that, since you tend to forget some of the small changes. I've also occasionally had to first do a "Clean Solution" then a full rebuild to fix some odd errors.

Hi Paul,

It turned out the error was in one of the unrelated test pages where I tried to play with the more complex User Control consisting of a bunch of UC. Once I removed that page from the project, everything is back to normal - e.g. I'm able to run my page and now working on the errors I had before slowly fixing them one by one.

Too bad I have to run now :(