String.search problem...

I am trying to process the lines of a file using "readline".
I have pasted my code below. For some reason when I call
the method string "search", I get the following error...

• error: js: (null): Javascript SyntaxError: unterminated character class , line 0
• error: js: error calling function Test

For the life of me, I can not figure this one out. I know
search is a method that exists because I have called
it before with no problems. Anyone have any ideas?

// inlets and outlets
inlets = 1;
outlets = 1;

var     IniFile = null;
function Test(filename)
{
    if(IniFile != null)
    {
        IniFile.close();
        IniFile = null;
    }

    IniFile = new File(filename, "read");
    if(IniFile.isopen == false)
    {
        post("FileIO Error: could not open file.n");
        return;
    }
    else
        post("file open.n");    

    var OutputStr = "";
    IniFile.position = 0;
    post("IniFile.position = " + IniFile.position + "n");
    post("IniFile.eof = " + IniFile.eof + "n");
    var Result = 0;
    var Line = "";
    while(IniFile.position != IniFile.eof)
    {
        Line = IniFile.readline (256);
        post("input: " + Line + "n");
        Result = Line.search("[");
        post("search done...n");
        if(Result != -1)
        {
            // remove section delimiters.
            Line.replace("[", "");
            Line.replace("]", "");
            OutputStr += Line + " ";
        }    
    }

    outlet(0, OutputStr);    
}