rkf45 and machine speed

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Posted by Jason on June 24, 1998 at 18:51:08:

I am trying to use the rkf45.f subroutine to solve a set
of ODE's. However, the compiler I am using (microsoft
fortran for pc) can't compile the code due to the use of
a variable: d1mach.
As far as I am aware, this is some term which relates
the machine speed to the minimum error tolerance (in
the comment, termed 'machine epsilon')
Is this term platform/compiler specific?
Can I safely comment this check out?
Anyone have any comments / advice?

Thanks in advance

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