NOTES from GAMS Users about 599 in TOMS 

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Contributed by Z. Levine, zachary.levine@nist.gov, 11 Dec 1997
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These codes were written with the assumption that the state of local
variables is preserved between subroutine calls.  With the advent of
Fortran 77 this assumption is no longer valid, and these codes
sometimes fail in current computing environments.

To remedy this problem, insert the following statement at the start
of each program unit.

      SAVE

Some Fortran compilers have options which do this automatically,
such as the -K option on Hewlett-Packard compilers and the -static
option on Silicon Graphic's compilers.