Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
ImageMagick requires the optional PNG delegate library to read/write PNG. Type
identify -list format
on both machines. Chances are on the one that fails, it does not mention PNG with a mode of rw-. If so, rebuild the distribution and ensure PNG support is noted after you run the configure script.
To add PNG support to ImageMagick download the PNG delegate library and build/install. Next rerun the ImageMagick configure script and ensure the output of the script says it found the PNG delegate library.
The reason the PNG delegate library failed to validate can be found in the config.log file generated by the configure script. Fix the problem and rerun the configure script until the PNG delegate library is validated.
