New error (Was Re: adding include path to xcode project)

I tried handling this problem from a different direction. The Maya 
devkit provides xcode build files for all the sample plug-ins. When I 
double-click on one, it requires me to make an update.

Build with the update gives the 2 errors I mentioned before:


Building target “helloCmd” of project “helloCmd” with configuration 
“Development” — (2 errors, 2 warnings)
[...]
  internal link edit command failed
		ld: Undefined symbols:
		__ZTI10MPxCommand
		/usr/bin/libtool: internal link edit command failed
Build failed (2 errors, 2 warnings)



Someone on the cgtalk.com Maya forum suggested that I set the target's 
"System C rule" to use GCC 3.3 instead of 4.0. There was another rule 
that identified GCC 4.0 also. Regardless of whether or I set one or both 
rules, the following error appears. There is a non-red helloWorld.dylib 
file in the products folder/group, but apparently xcode doesn't identify 
it as the correct one.

[...]
/bin/sh -c 
/Applications/Alias/maya6.0/devkit/plug-ins/build/helloCmd.build/Development/helloCmd.build/Script-8A8F789E05E54A880032FA51.sh
cp: /Applications/Alias/maya6.0/devkit/plug-ins/build/helloCmd.dylib: No 
such file or directory
cp: /Applications/Alias/maya6.0/devkit/plug-ins/build/helloCmd.dylib: No 
such file or directory
Build failed (1 error, 1 warning)
   


How do I get the linker to recognize the new dylib file, or otherwise 
get rid of the error and get my plug-in to build?

Thanks.