according to the documentation this is an indication that the img_codec_*.so file could not be found.

The files are not in /lib/dll but they are in /qnx-car/x86/lib/dll.   I cannot copy the require files into the /lib/dll 
folder.  I have touched and chmoded the lib and dll folders but the permissions do not change from read only.  My 
LD_LIBRARY_PATH is pointing to /qnx-car/x86/lib/dll but the function call still fails.

How do I change permissions on the /lib/dll folders? Is there some other environment variable that I need to set in 
order for the img_load_file() function call to succeed?