<font size=2 face="sans-serif">No single constraint is responsible for
an infeasibility. Consider a system with one variable, and two constraints,
X >= 7 and X <= 4. This system is obviously infeasible, but
which of the two constraints is at fault?</font>
<br>
<br><font size=2 face="sans-serif">In your case I suspect that the problem
is unbounded rather than infeasible, because you have so few constraints
and so many variables. Unless the problem has a very special structure,
a problem with fewer constraints than variables is likely to be unbounded.</font>
<br>
<br><font size=2 face="sans-serif">You can check this by adding a constraint
that limits your objective to, say, 1e6. If the problem now solves,
then unboundedness is almost certainly your difficulty.</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Christos <chtsolak@gmail.com></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">cbc@list.coin-or.org</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">08/10/2012 09:32 AM</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">[Cbc] Artificial variables</font></table>
<br>
<hr noshade>
<br>
<br>
<br><tt><font size=2>Hi, i have a model with around 10000 variable and
1500 equations.<br>
<br>
But i get the messages on the photo when i run it:<br>
</font></tt><a href="http://imageshack.us/photo/my-images/39/dascd.png/"><tt><font size=2>http://imageshack.us/photo/my-images/39/dascd.png/</font></tt></a><tt><font size=2><br>
<br>
Is there any way to use artificial variable or something else in order
<br>
to find the problematic equation?<br>
<br>
Thank you in advance<br>
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<br>