Just a reminder about Ansur file types:-
.mjo : Ansur Job (Work) Orders
.mtt : Ansur Test Templates
.mts : Ansur Test Sequences
.mtr : Ansur Test Records
The .mjo files contain DUT data.
The .mtt files contain the "PM Tasks"
The .mts files contain both the DUT and PM Tasks information.
I have found that Ansur can open events from either .mjo or .mts files (probably assuming that others are in place). However I believe that the logical intent was (is) to open up as .mts then work on those to close and save as .mtr.
Basically:- mjo+mtt = mts -> mtr
Which version of Ansur are you using ... and do you have the full version, or just a (restricted) "demo"?