How to compile and use pcaunzip_lite. Compilation: Pcaunzip_lite needs a fortran-95 compliant compiler, but nothing else, e.g.: % ifort -O -o pcaunzip_lite pcaunzip_lite.f90 should do the trick. Use: Pcaunzip_lite reads from standard input and writes to standard output: % pcaunzip_lite < compressed.pcz > uncompressed.crd The output trajectory is in AMBER formatted ("crd") format. Problems: 1. If you can't get the program to compile without errors, it's probably because you have an old fortran compiler that doesn't understand "stream" binary files. 2. If the program crashes, or produces what looks like junk output, you may have an endian issue (the native endian-ness of your system not matching that used by the system that created the binary .pcz file). With most modern compilers you can fix this by recompiling pcaunzip_lite with an extra flag to invert the endian-ness of its binary I/O - see you compiler's man page for details. 3. Any other issues, please get in touch: charles.laughton[at]nottingham.ac.uk Charlie Laughton, January 2012