diff --git a/casadm/extended_err_msg.c b/casadm/extended_err_msg.c
index a1c82f4..5c69afc 100644
--- a/casadm/extended_err_msg.c
+++ b/casadm/extended_err_msg.c
@@ -182,6 +182,11 @@ struct {
 		OCF_ERR_STANDBY_ATTACHED,
 		"Cache device is attached, please detach it first with --standby --detach"
 	},
+	{
+		OCF_ERR_CORE_SIZE_MISMATCH,
+		"Core volume size does not match"
+		" the size stored in cache metadata"
+	},
 
 	/* CAS kernel error mappings*/
 	{
diff --git a/ocf b/ocf
index c664411..6af8d20 160000
--- a/ocf
+++ b/ocf
@@ -1 +1 @@
-Subproject commit c6644116ae53f7ba851473cda5c02423380ebcdf
+Subproject commit 6af8d20ceef70898364b5742feba5d6b2743fb29