diff --git a/parseany.go b/parseany.go
index dc8abc7..b2e5b32 100644
--- a/parseany.go
+++ b/parseany.go
@@ -45,7 +45,6 @@ const (
 	dateAlphaWsAlphaYearmaybe
 	dateWeekdayComma
 	dateWeekdayAbbrevComma
-	//dateWeekdayAbbrevCommaDash
 )
 const (
 	// Time state
@@ -356,6 +355,7 @@ iterRunes:
 			i += (bytesConsumed - 1)
 		}
 
+		//gou.Debugf("i=%d r=%s state=%d   %s", i, string(r), p.stateDate, datestr)
 		switch p.stateDate {
 		case dateStart:
 			if unicode.IsDigit(r) {
@@ -421,6 +421,8 @@ iterRunes:
 			case '年':
 				// Chinese Year
 				p.stateDate = dateDigitChineseYear
+			case ',':
+				return nil, fmt.Errorf("Unrecognized format %q", datestr)
 			default:
 				//if unicode.IsDigit(r) {
 				continue
diff --git a/parseany_test.go b/parseany_test.go
index 8c911c1..8d6fe4a 100644
--- a/parseany_test.go
+++ b/parseany_test.go
@@ -523,11 +523,27 @@ func TestPStruct(t *testing.T) {
 	assert.True(t, len(p.ts()) > 0)
 }
 
+var testParseErrors = []dateTest{
+	{in: "3", err: true},
+	{in: `{"hello"}`, err: true},
+	{in: "2009-15-12T22:15Z", err: true},
+	{in: "5,000-9,999", err: true},
+	{in: "xyzq-baad"},
+}
+
+func TestParseErrors(t *testing.T) {
+	for _, th := range testParseErrors {
+		v, err := ParseAny(th.in)
+		assert.NotEqual(t, nil, err, "%v for %v", v, th.in)
+	}
+}
+
 var testParseFormat = []dateTest{
 	// errors
 	{in: "3", err: true},
 	{in: `{"hello"}`, err: true},
 	{in: "2009-15-12T22:15Z", err: true},
+	{in: "5,000-9,999", err: true},
 	//
 	{in: "oct 7, 1970", out: "Jan 2, 2006"},
 	// 03 February 2013