DMT 3.1 Released - Wed, 16 Oct 2019

I’m working on a series of articles to show how I am using the new 3.0 version of Double Match Triangulator to analyze my own segment match data.

As much as I’d like you to believe that I’ve developed DMT for the good of genetic genealogists everywhere, I humbly admit that I actually developed it so that I could analyze my own DNA to help me figure out how some of my DNA matches might be related.

Of course, as I started working on my articles, first looking at my 23andMe matches, I found some problems in my new 3.0.1 version, and a few places I could make enhancements.

If you downloaded version 3.0 that was released on Oct 1, or 3.0.1 on Oct 3, please upgrade to 3.1 whenever you can.

If you are a member of the Genetic Genealogy Tips and Tricks group on Facebook, or the DNA Painter User Group on Facebook, my free trial key I gave there is still valid and will let you run the full version of DMT until the end of October. Just look for my post on Oct 2 on either group for the key.

Some of the enhancements in Version 3.1 include:

• The grandparent extension algorithm:  I found a few extra extensions where they should not be. So I completely changed the algorithm to one that was clearer and easier for me to verify that it is working properly. The final results are similar to the old algorithm, but they’re significant enough to make a noticeable effect on the grandparent assignments.
• Small improvements were made to the determination of triangulation boundaries.
• Internally, I increased the minimum overlap DMT uses from 1.0 Mbp to 1.5 Mbp. This was to prevent some incorrect overlaps between two segments when there was a bit of random matching at the overlapping ends of the segment.

And there were a few bug fixes:

• If you run 32-bit Windows, then the DMT installer installs the 32-bit version of DMT rather than the 64-bit version. The 32-bit version had a major bug that crashes it when writing the People file. Nobody complained to me about this, so I guess most of you out there are running 64-bit Windows. Maybe one day in the not-too-distant future, I’ll only need to distribute just the 64-bit version of DMT.
• In the Combine All Files run, a few matches were not being assigned an AC Consensus when they should have been. Also a few assignments of AC No Parents was made when there was a parent.
• 23andMe FIA match files downloaded using DNAGedcom were not being input correctly.

Now back to see what DMT can do for me.