InfoPath Dev

I have been publishing a browser-based form throughout its creation and all of a sudden I am faced with the error: InfoPath cannot save the following form....The specified network name is no longer available. I can see that it tries to connect to the library because it wipes out all previously submitted data from the library columns but ...

I have tried following the suggestions in this post and am not getting the result I need. I have concatenated three data sets in a drop down box (pulling from a list) and when I make a selection, each data set needs to populate the corresponding box (via the calculated field function).   The name of my drop down field is ...