ConvHAR is a Windows program which converts between Lahey and Fujitsu binary files.
Click below to download the file CONVHAR.ZIP.
Put this file into the directory (usually C:\GP) in which GEMPACK is installed.
Then unzip CONVHAR.ZIP.
This should produce files CONVHAR.EXE and CONVHAR.CHM.
Download CONVHAR.ZIP [1.2MB, updated July 2011].
CONVHAR.ZIP also contains Flavour.EXE, a tool to find out which compiler created a GEMPACK EXE file.
See also the relevant section of the GEMPACK Manual.