diff --git a/src/cat/TPTScriptInterface.cpp b/src/cat/TPTScriptInterface.cpp
index e82155973..6519aec4e 100644
--- a/src/cat/TPTScriptInterface.cpp
+++ b/src/cat/TPTScriptInterface.cpp
@@ -439,9 +439,13 @@ AnyType TPTScriptInterface::tptS_load(std::deque<std::string> * words)
 	//Arguments from stack
 	NumberType saveID = eval(words);
 
-	c->OpenSavePreview(saveID.Value(), 0, false);
-
-	return NumberType(0);
+	if (saveID.Value() > 0)
+	{
+		c->OpenSavePreview(saveID.Value(), 0, false);
+		return NumberType(0);
+	}
+	else
+		throw GeneralException("Invalid save ID");
 }
 
 AnyType TPTScriptInterface::tptS_bubble(std::deque<std::string> * words)