Error Rendering Control

jjc9809
jjc9809 used Ask the Experts™
on
Hi everybody,

I am getting the "Error Rendering Control" box shown in the attachment.  The project runs OK, but these errors are showing in the design view.  What is causing them?
Selection.png
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Glanced up at my screen and thought I had coded the Matrix...  Turns out, I just fell asleep on the keyboard.
Most Valuable Expert 2011
Top Expert 2015
Commented:
I suggest inspecting the code-behind of the InstitutionSelector user control. You are apparently trying to execute a member against a null reference. Check the contstructor (if you added one) or any of the life-cycle methods for uninitialized variables.

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