From 2598863d026cc35f57702205ef3140041f8b93f5 Mon Sep 17 00:00:00 2001
From: Momoko Kono <momoko.kono@fixstars.com>
Date: Tue, 3 Jan 2023 15:58:30 -0800
Subject: [PATCH 1/2] added exception on u3v_camera2_opencv

---
 example/u3v_camera2_opencv/u3v_camera2_opencv.cc | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/example/u3v_camera2_opencv/u3v_camera2_opencv.cc b/example/u3v_camera2_opencv/u3v_camera2_opencv.cc
index 13ec6dab..48a5ab49 100644
--- a/example/u3v_camera2_opencv/u3v_camera2_opencv.cc
+++ b/example/u3v_camera2_opencv/u3v_camera2_opencv.cc
@@ -4,6 +4,8 @@
 
 #include <ion/ion.h>
 
+#include <exception>
+
 using namespace ion;
 
 #define FEATURE_GAIN_KEY "Gain"
@@ -100,7 +102,15 @@ int main(int argc, char *argv[])
   {
     pm.set(dispose_p, i == loop_num-1);
     // JIT compilation and execution of pipelines with Builder.
-    b.run(pm);
+    try {
+        b.run(pm);
+    }catch(std::exception& e){
+        // e.what() shows the error message if pipeline build was failed.
+        std::cerr << "Failed to build pipeline" << std::endl;
+        std::cerr << e.what() << std::endl;
+        exit(1);
+    }
+
 
     // Convert the retrieved buffer object to OpenCV buffer format.
     //  C and D are objects that store the result after smoothing.

From 1ba3a25668713aacacc8385bc97f5d8727fc0769 Mon Sep 17 00:00:00 2001
From: Momoko Kono <momoko.kono@fixstars.com>
Date: Fri, 6 Jan 2023 13:12:05 -0800
Subject: [PATCH 2/2] updated error message

---
 example/u3v_camera2_opencv/u3v_camera2_opencv.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/example/u3v_camera2_opencv/u3v_camera2_opencv.cc b/example/u3v_camera2_opencv/u3v_camera2_opencv.cc
index 48a5ab49..8c9baba3 100644
--- a/example/u3v_camera2_opencv/u3v_camera2_opencv.cc
+++ b/example/u3v_camera2_opencv/u3v_camera2_opencv.cc
@@ -105,13 +105,12 @@ int main(int argc, char *argv[])
     try {
         b.run(pm);
     }catch(std::exception& e){
-        // e.what() shows the error message if pipeline build was failed.
+        // e.what() shows the error message if pipeline build/run was failed.
         std::cerr << "Failed to build pipeline" << std::endl;
         std::cerr << e.what() << std::endl;
         exit(1);
     }
 
-
     // Convert the retrieved buffer object to OpenCV buffer format.
     //  C and D are objects that store the result after smoothing.
     cv::Mat A(height, width, CV_16UC1);