From 133a05687d93d858960c7b14b6d48bfdfbbf2136 Mon Sep 17 00:00:00 2001
From: Shivansh Bagai <shivanshbagai28@gmail.com>
Date: Mon, 4 Aug 2025 16:35:51 +0530
Subject: [PATCH] fixed issue #50

---
 lib/metamodelutil.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/metamodelutil.js b/lib/metamodelutil.js
index e7102e4..140f647 100644
--- a/lib/metamodelutil.js
+++ b/lib/metamodelutil.js
@@ -112,9 +112,20 @@ function createNameTable(priorModels, metaModel) {
  * @param {object} table - the name table
  * @return {string} the namespace for that name
  */
+// errors/NameNotFoundException.js
+import { BaseException } from 'concerto-core';
+
+export class NameNotFoundException extends BaseException {
+    constructor(name) {
+        super(`Name "${name}" not found`);
+        this.name = 'NameNotFoundException';
+        this.missingName = name;
+    }
+}
+
 function resolveName(name, table) {
     if (!table[name]) {
-        throw new Error(`Name ${name} not found`);
+        throw new NameNotFoundException(name);
     }
     return table[name].namespace;
 }