It's not exactly clear what the actual format of your text file is. Are all entries just separated by one space?
Anyway, if the file consists just of a series of text strings, I wouldn't use textscan for that. I would simply read the whole file in one go, then use a regular expression to get the result:
filecontent = fileread('c:\somewhere\somefile.txt');
scchildren = regexp(filecontent, '(?<=/SoftwareComponents/)\w+', 'match')
Note that the above regular expression assumes that the name of a child consists only of characters from the set [A-Za-z_0-9].
