See Also
The Message Log displays detailed results of each Power Flow Solution, chronicling the solution process iteration by iteration. It also reports messages raised by Simulator in performing various operations, such as opening or validating a case. The Message Log can be helpful when you run into problems solving a particular simulation case. The Message Log is not used with Viewer.
To display the Message Log, go to the Tools ribbon tab, and click the button 
Log on the Log ribbon group. This button is also available on the Add Ons ribbon tab.
The Message Log is one of the few windows that is set by default to be Free-Floating On Top.
Message Log Local Menu
Right-clicking on the Message Log displays its local menu. To change the font characteristics of the log, select Change Font.
To suppress or change color of certain messages associated with the power flow case select either Suppress Messages or Color Messages and then the desired message whose characteristics want to change. For more information about the colors and messages see the Message Log Options.
You can find certain text by clicking on Find, and then entering the text in the dialog displayed. Also, you can highlight all the text in the log, or inversely unselect all the highlighted text by clicking on Select All (CTRL+A), or Unselect All, respectively. To print or copy the contents to the Windows clipboard of a highlighted section of the message log, select Print Selection or Copy Selection to Clipboard (CTRL+C). You can also clear the contents of the log by selecting Clear Window. Lastly, you will find some log options available, such as Change Maximum Lines, Disable Logging, Disable Time Stamp, and Save Log to File options which allow automatically saving the log to a file during load flow analysis.
Message Log Color Outlines and Color Background
When solving the power flow, there are several loops which occur that are discussed the Solving the Power Flow Topic. These loops will generate Red, Purple, Green, and Blue outlines on the message log to visually indicate which loop the message text is generated by. This helps in determining which part of a the power flow solution may be having difficulty solving.
Additionally, when the various tools and add-ons send message text to the log the background of the text will be colored to indicate this. For instance, contingency analysis actions originating from the contingency will be highlighted with a light blue background, while PV, QV, ATC, and OPF add-on message text will be highlighted with a light yellow background.