You need to switch to pedigree view mode in order to open One2three.
It seems like you need to be in the pedigree view mode in order to open the "one2" file. Try switching to pedigree view mode and then opening the file again.
Reads and display XY-plots on an XY-graph or as a 2D intensity plot.
It allows you to view and print files created by Edraw or Visio.
This program can display complex and also simple mathematical functions.
You need to switch to pedigree view mode in order to open One2three.
It seems like you need to be in the pedigree view mode in order to open the "one2" file. Try switching to pedigree view mode and then opening the file again.