I have several custom webparts which i am attempting to add to a custom page WebPartZone using SPD2010.
I can successfully add one, however when i attempt to add the other i get an "Error Creating Control- Object reference not set to an instance of an object" error. I can however deploy my solution from VS and successfully add both webparts to the page in the browser UI with no errors.
The weird part is that both webparts are similar (when it comes to the code, one is roughly 80% of the other). Both are identical when it comes to getting the SPContext for the site and the web.
Any Ideas how i can find out whats going on?