Originally posted by: bbrunaud

Hello

I would like to get all the cuts at the root node. However, when I get the lp file for the root node I notice that bounds have also changed. I run the model with heuristics and presolve turned off. What else makes bounds change if it's not heuristics or presolve?. Can I disable whatever that is?.

```

CPX_PARAM_PREIND                 0
CPX_PARAM_PROBE                 -1

```

Here is an example of a file I retrieved. In this case, no cuts where added, only bound changes.

```

Minimize
 obj: - 4 VAR4
Subject To
 c1: VAR4 + VAR3 <= 1
 c2: 5 VAR4 + 8 VAR1 + 2 VAR2 <= 10
 c3: - VAR1 + VAR5  = 0
 c4: - VAR2 + VAR6  = 0
Bounds
      VAR4 = 0
 0 <= VAR3 <= 1
      VAR1 = 1
      VAR2 = 0
      VAR5 = 1
      VAR6 = 0
End

```

thanks

Reduced cost fixing may fix variables to their bounds. While there is a hidden parameter to disable reduced cost fixing, there is no guarantee that CPLEX will not fix bounds by other means. CPLEX is just not designed to run in a "very stupid" mode. if you send an email to daniel(dot)junglas(at)de(dot)ibm(dot)com then I can tell you about that hidden parameter (please also specify which API you are using) but it may still not get you the desired results.