diff --git a/modules/gapi/samples/pipeline_modeling_tool.cpp b/modules/gapi/samples/pipeline_modeling_tool.cpp
index a10cb5f052236b334e80d061b2a8a06093978d8c..bacd1742ea12dc93db127fd63d1b4469f6c4f3e9 100644
--- a/modules/gapi/samples/pipeline_modeling_tool.cpp
+++ b/modules/gapi/samples/pipeline_modeling_tool.cpp
@@ -193,7 +193,7 @@ CallParams read<CallParams>(const cv::FileNode& fn) {
 template <typename V>
 std::map<std::string, V> readMap(const cv::FileNode& fn) {
     std::map<std::string, V> map;
-    for (auto item : fn) {
+    for (auto&& item : fn) {
         map.emplace(item.name(), read<V>(item));
     }
     return map;
@@ -380,10 +380,14 @@ int main(int argc, char* argv[]) {
                     builder.addDummy(call_params, read<DummyParams>(node_fn));
                 } else if (node_type == "Infer") {
                     auto infer_params = read<InferParams>(node_fn);
-                    RETHROW_WITH_MSG_IF_FAILED(
-                            utils::intersectMapWith(infer_params.config, gconfig),
-                            "Failed to combine global and local configs for Infer node: "
-                            + call_params.name);
+                    try {
+                        utils::mergeMapWith(infer_params.config, gconfig);
+                    } catch (std::exception& e) {
+                        std::stringstream ss;
+                        ss << "Failed to merge global and local config for Infer node: "
+                           << call_params.name << std::endl << e.what();
+                        throw std::logic_error(ss.str());
+                    }
                     builder.addInfer(call_params, infer_params);
                 } else {
                     throw std::logic_error("Unsupported node type: " + node_type);
diff --git a/modules/gapi/samples/pipeline_modeling_tool/utils.hpp b/modules/gapi/samples/pipeline_modeling_tool/utils.hpp
index c8f0101fe1da4827dac3515ec85efa8d1920b0bd..a5be3237475d7fcbd739e047b5d5d399f01b7acc 100644
--- a/modules/gapi/samples/pipeline_modeling_tool/utils.hpp
+++ b/modules/gapi/samples/pipeline_modeling_tool/utils.hpp
@@ -93,21 +93,12 @@ typename duration_t::rep timestamp() {
     return duration_cast<duration_t>(now.time_since_epoch()).count();
 }
 
-#define RETHROW_WITH_MSG_IF_FAILED(expr, msg)      \
-    try {                                          \
-        expr;                                      \
-    } catch (const std::exception& e) {            \
-        std::stringstream ss;                      \
-        ss << msg << "\n caused by: " << e.what(); \
-        throw std::logic_error(ss.str());          \
-    }                                              \
-
 template <typename K, typename V>
-void intersectMapWith(std::map<K, V>& target, const std::map<K, V>& second) {
+void mergeMapWith(std::map<K, V>& target, const std::map<K, V>& second) {
     for (auto&& item : second) {
         auto it = target.find(item.first);
         if (it != target.end()) {
-            throw std::logic_error("Met already existing key: " + item.first);
+            throw std::logic_error("Error: key: " + it->first + " is already in target map");
         }
         target.insert(item);
     }