helpString += "The set.dir command can also be used to specify the directory where your input files are located, the directory must exist.\n";
helpString += "The set.dir command can also be used to override or set the default location mothur will look for files if it is unable to find them, the directory must exist.\n";
helpString += "The set.dir command can also be used to run mothur in debug mode.\n";
helpString += "The set.dir command can also be used to specify the directory where your input files are located, the directory must exist.\n";
helpString += "The set.dir command can also be used to override or set the default location mothur will look for files if it is unable to find them, the directory must exist.\n";
helpString += "The set.dir command can also be used to run mothur in debug mode.\n";