Log File

Every time you press the Run button, the DMT program shows you progress information about the run in the "Messages" area of DMT's main window.
DMT also creates a log file that documents what was produced and contains summary information as well as any errors encountered. Log files are saved in Folder A along with the DMT Excel Output files, allowing you to see the details of any run.
  Log File

Notepad Header

1. Notepad Header
This example shows a DMT log file opened with Notepad. Notepad lists the name of the file that it is displaying in its header.

Person A

2. Person A
Information about Person A is shown first. Any problems encountered when reading Person A's match file are shown on lines that begin with ***.
In the above example, problems are indicated showing that the segment match files contain duplicate or overlapping segments. This may happen in Family Tree DNA's match files, because they sort their results by the tester's name. Different testers may have the same name, or one tester may have tested twice, resulting in two kits with the same name. For this problem, DMT will delete duplicate segments so that the person/people can still be used in the analysis. Duplicate segments can occur when a person has more than one test result in Family Tree DNAs database under the same name. Those may be okay because every segment match is simply duplicated, and DMT will ignore the duplicated. But overlapping segments should not happen for one person, and when they do, they indicate that two different people with the same name were combined by mistake by Family Tree DNA. DMT will show all overlapping segments. People with overlapping segments are denoted in the output with ## before their name to alert you that this represents more than one person.
A summary of the number of Person A's segment matches are shown, along with the number of different people those segments match to.
I've added into DMT, a prediction of whether the tester is male or female based on the percentage of people matched on the X chromosome to total people matched. This is not currently used in any way by DMT, but may be made use of in the future. If you find some cases where it is inaccurate, please let the author, Louis Kessler, know.

Person B

3. Person B
Information about Person B is shown next. It's contents are similar to the information shown for Person A.

Summary of AB Matches

4. Summary of AB Matches
The segment matches between Person A and Person B are shown. Person A's segment match file matches for Person B should exactly match Person B's segment match file for Person A. If for some reason they do not, the non-matching segments will be displayed.
If you are using a segment match file for Person A or Person B that was downloaded before other was tested, then the first person will not have the second person in their file. The DMT Map file will then use the AB matches from the second person and let you know it is doing so in a message. For a double match to be found, the single matches AC and BC need to be in both files, so any C people who tested after either the Person A or Person B segment match files were downloaded will not appear in double matches. If you need any of those C people for your analysis, you should get new segment match files for Person A and Person B.

Segment Size and Experimental Information

5. Segment Size and Experimental Information
During development of Version 2 of DMT, I wanted to see some summary statistics by segment size. I found those useful so I left them in.
The numbers between angle brackets are cM sizes. The numbers between them are the statistics between those sizes.  For example, in the "AC Matches by segment size" line, you'll see "<2> 54964, 29.8% <3>". That means that for segment sizes 2 cM up to 3 cM, there are 54964 AC matches and they make up 29.8% of the 184607 total AC matches. The total is at the end of the line, which is cut off in this example. The cM endpoints in angle brackets are 1, 2, 3, 4, 5, 7, 10, 15, 25 and Max.
You'll find other experimental information in the log files, such as the Sex estimator (described in the Person A section, above). Most of these are in the log file when you use the "Combine all results" option. You'll find detection of parent/child or sibling relationsships. The parent/child relationships include an attempt to determine who is the parent and who is the child. I hope to make use of this information and other information like this in future versions to allow DMT to do some of the analysis for you. Stay tuned.