Gaussian 03 Online Manual
Last update: 29 September 2006

unfchk

This utility is the opposite number to formchk. It converts a formatted checkpoint file to a binary checkpoint file, in a format appropriate to the local computer system:

$ unfchk 
 Formatted Checkpoint file? water 
 Read formatted file water.fchk 
 Write checkpoint file water.chk 

The utility applies the extension .fch to the specified filename on Windows systems and the extensions .fchk on other computer systems.

Note that formatted checkpoint files can be used as a data exchange format between computer platforms. Use formchk on the originating computer and unfchk on the target computer to create a binary checkpoint file.