InfoPath Dev

I rebuilt the form from scratch... The new form works okay... Thanks for all your help :-)  Who knows what happened

Preview works until I make any change to the form. What's funny is, I went back to the first form that always worked for me and I get the same problem.  

I found out that if I change the security default level to restricted, the form opens but without content for items that need network input. I tried using domain and placing what I think is the domain for previewing, but nada. Maybe the company change some networking security stuff and now my forms no longer open. Just a guess...

It wouldn't be so bad if there was some indication, pop-up, error message or something that provided insight.  I went to a known working form and attempted the same thing on another user's PC... Same Problem

It looks like any change to the form requires the form to be re-compiled and it cannot resolve something. There are no error indications, no posts, nada. Form Checker is clear What's strange is something has changed since I have modified this form several times in the past and re-published without problems. If I re-publish this same ...

No errors when attempting to open initially or after any modifications. If I make any change at all, the preview just hangs with a message at the lower left saying: Opening Form.... <--- Hangs right here

I have a working, published form, but if I change anything in it, the form will not open. I tried saving to a new source folder, created new nsn file, etc. No good.  The form works fine until I go into the designer and change anything. Then it will not open for preview or otherwise. Checker says: No error  I can actually still publish ...