Posted by Lozminda on URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Running-Test-Script-wipes-out-Chip-parts-tp4034131p4034139.html
Also your txt files have to be saved in the correct "character encoding" it's windows 1252 I think....
(I might be wrong about windows 1252)
for example