data sets disappear - unspecified error

Question

I have something unusual going on. I move a project between 1 of 3 machines. I have been doing this for months during development on XP. This is a CSharp web project. My datasets disappear. I can do a save and build and there are no errors. Yet, when I go to a form with a dataset, adapter and connection object - the data sets are gone. I cannot regenerate them because I get an "Unspecified error" when I right click on the adapter and attempt to "generate a dataset." Any ideas? Thanks for looking at this question. William