diff --git a/lib/main.js b/lib/main.js
index 481c8e5..a256dc7 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -38,7 +38,7 @@ var numel = require( '@stdlib/ndarray-base-numel' );
 var slice = require( '@stdlib/ndarray-base-slice' );
 var nextCartesianIndex = require( '@stdlib/ndarray-base-next-cartesian-index' ).assign;
 var args2multislice = require( '@stdlib/slice-base-args2multislice' );
-var format = require( '@stdlib/string-format' );
+var format = require( '@stdlib/error-tools-fmtprodmsg' );
 
 
 // MAIN //
@@ -103,7 +103,7 @@ function nditerStacks( x, dims ) {
 	var j;
 
 	if ( !isndarrayLike( x ) ) {
-		throw new TypeError( format( 'invalid argument. First argument must be an ndarray. Value: `%s`.', x ) );
+		throw new TypeError( format( 'null4f', x ) );
 	}
 	if ( !isIntegerArray( dims ) ) {
 		throw new TypeError( format( 'invalid argument. Second argument must be an array of integers. Value: `%s`.', dims ) );
@@ -114,15 +114,15 @@ function nditerStacks( x, dims ) {
 	if ( arguments.length > 2 ) {
 		options = arguments[ 2 ];
 		if ( !isPlainObject( options ) ) {
-			throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
+			throw new TypeError( format( 'null2V', options ) );
 		}
 		if ( hasOwnProp( options, 'readonly' ) ) {
 			if ( !isBoolean( options.readonly ) ) {
-				throw new TypeError( format( 'invalid option. `%s` option must be a boolean. Option: `%s`.', 'readonly', options.readonly ) );
+				throw new TypeError( format( 'null2o', 'readonly', options.readonly ) );
 			}
 			opts.writable = !options.readonly;
 			if ( opts.writable && isReadOnly( x ) ) {
-				throw new Error( format( 'invalid option. Cannot write to read-only array.' ) );
+				throw new Error( format( 'nullF4' ) );
 			}
 		}
 	}
@@ -142,7 +142,7 @@ function nditerStacks( x, dims ) {
 	for ( i = 0; i < M; i++ ) {
 		d = normalizeIndex( dims[ i ], ndims-1 );
 		if ( d === -1 ) {
-			throw new RangeError( format( 'invalid argument. Dimension index exceeds the number of dimensions. Number of dimensions: %d. Value: `%d`.', ndims, dims[ i ] ) );
+			throw new RangeError( format( 'nullF8', ndims, dims[ i ] ) );
 		}
 		dims[ i ] = d;
 	}
diff --git a/package.json b/package.json
index d3d6e96..064b776 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "@stdlib/ndarray-base-slice": "^0.2.2",
     "@stdlib/ndarray-shape": "^0.2.2",
     "@stdlib/slice-base-args2multislice": "^0.2.2",
-    "@stdlib/string-format": "^0.2.2",
+    "@stdlib/error-tools-fmtprodmsg": "^0.2.2",
     "@stdlib/symbol-iterator": "^0.2.2",
     "@stdlib/types": "^0.4.3",
     "@stdlib/utils-define-nonenumerable-read-only-property": "^0.2.2",