What would get edit and continue working again?

Visual Studio's edit-and-continue feature stopped working at some point again.

VisualStudio 2010 sp1 professional. I'm writing a dll with c++ native code. I run the host 32bit executable from 开发者_开发百科the ide. I have the .pdb beside the .dll. I tried just editing some whitespace to eliminate the possibility that I'm creating scenarios that aren't possible to inject. I hit "apply changes" and this is what I see in the output window.

-------- Edit and Continue build started --------

--------------------- Done ----------------------

However I see this in a dialog that pops up:

Edit and Continue
----------------------------------------
Edits were made which cannot be compiled

Click Edit to fix the code.
Click Stop to stop debugging.
Click Ignore to continue without applying edits
[Edit][Stop][Ignore]

Anyone have ideas about how to go about fixing this? The code does compile. Debug breakpoints work. I just want to cut down on the long start-up times this application has to do the testing.

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If this works for you, you can upvote the original Post by the author of this link (and its answer): Can't edit and continue when using Visual Studio 2010 on a 64 bit machine, app targets x86