From 895342bf741e40b03dba6b75573f1f635d26a314 Mon Sep 17 00:00:00 2001
From: Brian Martin <42186431+martinb35@users.noreply.github.com>
Date: Wed, 13 Nov 2019 14:57:32 -0800
Subject: [PATCH] return proper error when the model path isn't found (#2391)

---
 winml/lib/Api.Core/ModelInfo.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/winml/lib/Api.Core/ModelInfo.cpp b/winml/lib/Api.Core/ModelInfo.cpp
index b4ea23e581..09fe1659d2 100644
--- a/winml/lib/Api.Core/ModelInfo.cpp
+++ b/winml/lib/Api.Core/ModelInfo.cpp
@@ -137,6 +137,7 @@ std::unique_ptr<onnx::ModelProto>
 WinML::CreateModelProto(
     const char* path) {
   int file_descriptor;
+  _set_errno(0); // clear errno
   _sopen_s(
       &file_descriptor,
       path,
@@ -144,6 +145,14 @@ WinML::CreateModelProto(
       _SH_DENYWR,
       _S_IREAD | _S_IWRITE);
 
+  errno_t err = 0;
+  _get_errno(&err);
+  WINML_THROW_HR_IF_TRUE_MSG(
+    __HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND),
+    err == ENOENT,
+    "File not found: %s",
+    path);
+
   WINML_THROW_HR_IF_TRUE_MSG(
       E_FAIL,
       0 > file_descriptor,