<p>Good Day!</p>
<p> I'm using RSymphony (package that uses Symphony for R).<br /> I'm running rather large LP problems : about 1000-3000 variables and 800-2000 constraints.</p>
<p> For some my test-cases i get return code 226 (NO_SOLUTION). But i know that there are simple solutions and may be rather complex too.</p>
<p> I set param verbosity to 140 and get such return:</p>
<p> </p>
<p>Skipping Preprocessor<br />Problem has<br /> 834 constraints<br /> 1065 variables<br /> 4366 nonzero coefficients<br /><br />Solving...<br /><br />granularity set at 0.000001<br /><br />TM: tree size: 0 , 0<br /><br />****************************************************<br />* Now processing NODE 0 LEVEL 0 (from TM)<br />****************************************************<br /><br />Diving set to 2<br /><br /><br /><br />**** Starting iteration 1 ****<br /><br />solving root lp relaxation<br />Terminating due to high cost -- fathoming node (no more cols to check)<br /><br /><br />****************************************************<br />* Branch and Cut Finished *<br />* Now displaying stats and best solution found... *<br />****************************************************<br />.....</p>
<p> </p>
<p> </p>
<p> Also if i do some mixing constraints & variables then get solution - it is most strange issue.</p>
<p> </p>
<p> Please Can you help me:<br />- explain why i can't get solution<br />- advise any params (or may be combination) that can help me to get any solution (already tryed some from "<a name="SECTION00745000000000000000">LP parameters"</a> and some others)</p>
<pre>Thanks a lot.</pre>
<p> </p>