From fbe0cb02513ebb92898aa7c94ce36d7de00f71a6 Mon Sep 17 00:00:00 2001
From: Alexey Fedoseev <aleksey@fedoseev.net>
Date: Sat, 13 Apr 2024 16:08:28 +0300
Subject: [PATCH] check default SM while writing

---
 cyberiadaml.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cyberiadaml.c b/cyberiadaml.c
index 866ef7f..ef7c74a 100644
--- a/cyberiadaml.c
+++ b/cyberiadaml.c
@@ -3591,7 +3591,8 @@ static int cyberiada_update_metainfo_comment(CyberiadaDocument* doc)
 	CyberiadaNode *sm_node, *first_node, *meta_node;
 	if (!doc->state_machines) {
 		/* empty doc */
-		return CYBERIADA_NO_ERROR;
+		ERROR("At least one SM required\n");
+		return CYBERIADA_BAD_PARAMETER;
 	}
 	sm_node = doc->state_machines->nodes;
 	if (sm_node->type != cybNodeSM ||