I have created a new solution and bound it into a runtime version. I have used Inno as my installer in the past with no problems. Now I am getting a message when I try to launch the runtime app saying it failed because it could not locate xerces.dll, yet when I look at the runtime package that file is clearly there. I have tried rebinding the original solution and recreating the Inno script several times all with the same result. Any insights would be appreciated.

Well, what if you don't use an installer, and launch the runtime? And, what platform and versions? Where are you installing the runtime? Perhaps a permissions issue?

I have seen this error when the user attempts to run the solution from inside a zip file. Extracting the files from the zip archive and running the app from a normal folder solved the problem.