try {
comparisonReader = new BufferedReader(new FileReader(comparisonFileName));
if (getGui() != null) {
TextFileGUI comp = ((HackAssemblerGUI) getGui()).getComparison();
comp.reset();
comp.setContents(comparisonFileName);
comparisonProgram = new short[comp.getNumberOfLines()];
for (int i = 0; i < comp.getNumberOfLines(); i++) {
if (comp.getLineAt(i).length() != Definitions.BITS_PER_WORD) {