diff --git a/src/Lib/Array/array.cxx b/src/Lib/Array/array.cxx
index 7349901e..bf8ca911 100644
--- a/src/Lib/Array/array.cxx
+++ b/src/Lib/Array/array.cxx
@@ -79,7 +79,7 @@ TGArray::TGArray( const string &file ) {
 
 
 // open an Array file
-int
+bool
 TGArray::open( const string& file ) {
     // open input file (or read from stdin)
     if ( file ==  "-" ) {
@@ -87,34 +87,34 @@ TGArray::open( const string& file ) {
 	// fd = stdin;
 	// fd = gzdopen(STDIN_FILENO, "r");
 	cout << "  Not yet ported ..." << endl;
-	return 0;
+	return false;
     } else {
 	in = new sg_gzifstream( file );
 	if ( ! in->is_open() ) {
 	    cout << "  Cannot open " << file << endl;
-	    return 0;
+	    return false;
 	}
 	cout << "  Opening array data file: " << file << endl;
     }
 
-    return 1;
+    return true;
 }
 
 
 // close an Array file
-int
+bool
 TGArray::close() {
     // the sg_gzifstream doesn't seem to have a close()
 
     delete in;
 
-    return 1;
+    return true;
 }
 
 
 // parse Array file, pass in the bucket so we can make up values when
 // the file wasn't found.
-int
+bool
 TGArray::parse( SGBucket& b ) {
     if ( in->is_open() ) {
 	// file open, parse
@@ -238,7 +238,7 @@ TGArray::parse( SGBucket& b ) {
 	cout << "    File not open, so using zero'd data" << endl;
     }
 
-    return 1;
+    return true;
 }
 
 
diff --git a/src/Lib/Array/array.hxx b/src/Lib/Array/array.hxx
index 04d67abd..58f3db4d 100644
--- a/src/Lib/Array/array.hxx
+++ b/src/Lib/Array/array.hxx
@@ -84,13 +84,13 @@ public:
     ~TGArray( void );
 
     // open an Array file (use "-" if input is coming from stdin)
-    int open ( const string& file );
+    bool open ( const string& file );
 
     // close a Array file
-    int close();
+    bool close();
 
     // parse a Array file
-    int parse( SGBucket& b );
+    bool parse( SGBucket& b );
 
     // Use least squares to fit a simpler data set to dem data.
     // Return the number of fitted nodes