<font size=2 face="sans-serif">I have a model which I have been trying
to solve thus:</font>
<br>
<br><font size=2 face="sans-serif">> ./cbc -threads 4 -import trouble.mps
-solve -quit</font>
<br>
<br><font size=2 face="sans-serif">As you can see, the only even slightly
exotic thing I'm doing is enabling multithreading, which has worked fine
for me with less-challenging models.</font>
<br>
<br><font size=2 face="sans-serif">Cbc works on this for several hours
and then segfaults. I tried it three times. On two occasions,
it did about 5.5 M nodes before dying (taking about half a CPU-day, but
only three or four hours of wallclock time). On the third occasion,
it managed more than 27 M nodes and 2.5 CPU-days (but only overnight by
the wall clock).</font>
<br>
<br><font size=2 face="sans-serif">On all occasions, the number of nodes
on the tree rises rapidly to about 93 K, then remains approximately constant
(within a few hundred) for the rest of the ill-fated run.</font>
<br>
<br><font size=2 face="sans-serif">Has anyone else had similar experiences?</font>
<br>
<br><font size=2 face="sans-serif">I have not yet tried running the model
without multithreading, for obvious practical reasons: it would probably
take twelve hours if I was lucky, and might take sixty.</font>
<br>
<br><font size=2 face="sans-serif">I'll be glad to share the MPS file (about
a quarter of a meg uncompressed) with anybody who wants to try this.</font>