From bab468703cb27c599982c5e052500c6e160d710b Mon Sep 17 00:00:00 2001
From: Haroon Qureshi <haroonq@google.com>
Date: Thu, 22 Jan 2026 06:33:29 -0800
Subject: [PATCH] Display error message when requested file does not exist.

PiperOrigin-RevId: 859583121
Change-Id: Id9969e486499a70769e325161c3cd2c204006d9a
---
 src/experimental/studio/app.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/experimental/studio/app.cc b/src/experimental/studio/app.cc
index 8644d940..b35314b0 100644
--- a/src/experimental/studio/app.cc
+++ b/src/experimental/studio/app.cc
@@ -180,6 +180,11 @@ void App::LoadModelFromFile(const std::string& filepath) {
   const std::string resolved_file =
       platform::ResolveFile(filepath, search_paths_);
 
+  if (resolved_file.empty()) {
+    SetLoadError("File not found: " + filepath);
+    return;
+  }
+
   char err[1000] = "";
   if (resolved_file.ends_with(".mjb")) {
     model = mj_loadModel(resolved_file.c_str(), &vfs);