Log

About the Log pane

The Log pane allows you to quickly view the Solver output log (the Server.log file) for a solver run, the Optimizer output log (the Summary.txt file) for an optimization set run, or the messages related to the thermodynamic diagrams (such as a Phase Envelope).

You can use the Solver output log messages to help troubleshoot simulations that have poor convergence or robustness issues.

You can use the Optimizer output log messages to similarly troubleshoot optimization sets that have poor convergence or robustness issues.

You can use the thermodynamic diagram messages to troubleshoot the configuration of your thermodynamic diagrams.

Concepts

• The Log pane shows only the Solver output log, the Optimizer output log, or the thermodynamic diagram messages at one time.

• The Log pane shows the following relevant information from the Solver output log:

  • Block Decomposition Report – When you trigger an analyze run, the block decomposition of the latest analyze run appears in the Log pane

  • Homotopy Iteration Report – When you update a specified variable's value, the homotopy iteration path appears in the Log pane.

  • Solver Iteration Report for Failed Blocks – If your simulation struggles or fails to solve, you can use this report to identify the struggling equations and block. This report appears in the Log pane for any blocks that failed to solve.

• The Log pane shows the following relevant information from the Optimizer output log:

  • Optimization Solver – The type of nonlinear optimizer that solved the optimization.

  • Optimizer Options – The configuration for the optimizer that solved the optimization.

  • Optimization Problem Summary – The description of the system that the optimizer is trying to optimize.

  • OPERA Iteration Summary – The results from each solver iteration that the optimizer performed during the optimization.

• Currently, the Log pane shows thermodynamic diagram messages for Phase Envelopes only.

• The Optimizer output log is available only after you run an optimization set.

• You can find the Server.log and Summary.txt files in the %LocalAppData%\SimSci\SimCentral\Logs folder.

Actions

• On the Edit/View tab, in the Show group, select the Log checkbox to display the Log pane.

• Float or dock the Log pane.

• On the Edit/View tab, in the Show group, clear the Log checkbox to hide the Log pane.

• Use the Show output logs from list to switch between the Solver output log, the Optimizer output log, and the Thermo Diagrams messages.