Thanks to this list ....

I set out to appeal to this list for help with disentangling
a bewildering anomaly that was produced by some dynamically loaded
Fortran code.

In composing an email to explain the nature of the anomaly, I *FINALLY*
spotted the loony!  I had an expression in a nested do loop:

     j = npro + (r-1)*nvym1 + s

where r and s were the indices of two of the nested loops (explicitly
declared to be integer at the start of the subroutine in question).

When I copied the foregoing expression into the email I at last noticed
that the variable "nvym1" *should* have been "nyvm1".  See the subtle
difference?  :-)

The variable nvym1 was never initialised, so it took on strange values
plucked out of RAM, I guess.  Whence the anomaly.  Once I corrected that
trivial typo, things were OK.

Thanks everybody!!! :-)

cheers,

Rolf Turner

P.S. What I can't figure out (and won't waste any time trying) is
why the first four values of j were as they should have been, and things
did not go to hell in a handcart until the code got to the 5th value
of j.  I guess the computer gods were just amusing themselves at my
expense.

R. T.

And once again you have shown? that this list has an important side 
effect of helping us to help ourselves ...? :-)