Prima needs image libraries to work correctly. Unix and cygwin builds rely on existing installations of libjpeg, libungif, libtiff, libpng, libXpm, and libX11, all of them being optional dependencies. This binary distribution provides support for the BMP,PCX,GIF,JPEG,TIFF,PNG,XBM,XPM graphic formats, among others, for MSVC and cygwin builds. Dmitry Karasik