Figure 4.44: The CPLEX Log File Options Dialog Box
You can change the Log File options for CPLEX by choosing CPLEX parameters from the Options menu and then pressing the Log File tab. This will display the dialog box shown below:
Figure 4.44: The CPLEX Log File Options Dialog Box
| Option Name | MPL Name | Solver Param | ParamNr | Type | Default | Min | Max |
|---|---|---|---|---|---|---|---|
| MIP node log | MipNodeLogIndicator | MIPDisplay | 2012 | list | 2 | 0 | 5 |
| LP iteration log | IterationInfo | SimDisplay | 1019 | list | 1 | 0 | 2 |
| Barrier progress info log | BarrierIterLogInd | BarDisplay | 3010 | list | 1 | 0 | 2 |
| Network iteration log | NetIterationInfo | NetDisplay | 5005 | list | 2 | 0 | 2 |
The MIP Node log option controls the frequency of the node logging. This option is useful for monitoring the progress of a problem that requires many nodes to solve.
| No node log (0) | No node information appears in the log |
| Feasible nodes (1) | Node information appears only for each integer feasible solutions found |
| Every n-th node (2) | Node information appears for every n-th node where n is the number given in the input box. The default is every 100th nodes |
| Every node and iteration (3) | Node information appears for every node as well as the standard LP iteration log |
| Every node and relaxation (4) | Node information appears for every node as well as the LP root relaxation info |
| Every node and subproblem (5) | Node information appears for every node as well as the LP subproblem info |
The LP iteration log controls the amount of information that is sent to either the log window and/or the log file.
| No Iteration log (0) | No iteration information appears in the log. |
| Standard iteration log (1) | Iteration information appears for every refactorization |
| Full iteration log and pivot (2) | Iteration information appears for every iteration |
The Barrier progress info log option controls the level of progress information to be reported.
| No progress information (0) | No progress information appears in log |
| Normal information (1) | Normal progress information appears in log |
| Diagnostics information (2) | Diagnostic information appears in log |
| No iteration log (0) | No iteration information appears in the log |
| True objective values (1) | True objective values are included in the log |
| Penalized objective values (2) | Objective values, including monotonic values are included in the log |