title: AMPL CreateProcess(".\snopt.exe") failure! Error code 2
body: <p>I'm solving an svm problem with ampl (both primal and dual form).The model should be correct and indeed 
  it compiles without errors but I get the following error message:</p>
  
  <p>CreateProcess(".\snopt.exe") failure!
  Error code 2.</p>
  
  <p>these are my models:</p>
  
  <p>primal form</p>
  
  <pre><code>param n;
  
  param x{i in{1..n}, j in{1..2} };
  
  param y{i in{1..n}};
  
  var w{i in{1..2}};
  var b;
  
  # objective function
  
  minimize obj: 1/2 * sum{i in{1..2}}( w[i]^2 );
  
  subject to c1 {i in {1..n}}:  y[i] * ( sum{j in {1..2}} ( w[j] * x[i,j] ) + b ) &gt;= 1;
  
  </code></pre>
  
  <p>dual form:</p>
  
  <pre><code>reset;
  
  param l;
  param C := 10;
  
  
  var lambda{1..l}&gt;=0, &lt;= C; 
  param x{i in{1..l}, j in{1..2} };
  param y{i in{1..l}};
  
  minimize obj : 1/2*sum{i in 1..l}lambda[i]*y[i]*sum{k in 1..2}x[i,k]*
                              sum{j in 1..l}lambda[j]*y[j]*x[j,k];
  
  s.t.  vincolo1: sum{i in 1..l}lambda[i]*y[i]=0;
  </code></pre>
  
  <p>and model.dat</p>
  
  <pre><code>param n:=10;
  #param l:=10;
  
  param x : 1 2  :=
  1   -1  7   
  2   -2  5   
  3   2   5   
  4   -2  1   
  5   0   -1  
  6   -4  3   
  7   0   3   
  8   3   0   
  9   4   3   
  10  2   8;
  
  param y :=
  1   1
  2   1
  3   1
  4   1
  5   1
  6   -1
  7   -1
  8   -1
  9   -1
  10  -1;
  </code></pre>