Saving content of output log (on command prompt on BB) to a file


I have my start up script running on BB and its job is to execute one (exe) file and save it’s output to a different (document) file, so that I can analyze it later. The command I use is: “./blah >> myFile”. The problem is, later, when I want to read that data I see only bunch of unrecognisable signs. Is there any other way it can be achieved?

I realize that maybe this question is a total newbie question, but newbie I am.