Making Flank Attacks work again

I started working on my mod under BTS 3.0. Since then, Firaxis patched up to 3.19, and I believe it must have changed flanking attack behavior somewhere along the way.

My BTS is patched to 3.19, and in it flanking attacks work as they should. But in my mod, they don't happen when they should.

My mod is XML-only. Can anyone tell me what XML files I would have to modify to get flanking attacks working correctly in it?

Eureka! I found a very helpful answer provided by Wolfshanze in an earlier thread.

In a nutshell, to all you modders who started modding in 3.x (with x < 17), make sure for each unit you intend to perform flanking attacks, you change the lines:

to nonzero values. The default Firaxis values are:

For the power users out there, I've written a simple python script to make the changes for you. Here it is!