diff --git a/source/MRMesh/MRLog.cpp b/source/MRMesh/MRLog.cpp
index 561773eb3975..678010398993 100644
--- a/source/MRMesh/MRLog.cpp
+++ b/source/MRMesh/MRLog.cpp
@@ -35,26 +35,12 @@ void Logger::removeSink( const spdlog::sink_ptr& sink )
 
 std::filesystem::path Logger::getLogFileName() const
 {
-    if ( !logger_ )
-        return {};
-
-    for ( const auto& sink : logger_->sinks() )
-    {
-        if ( auto r = std::dynamic_pointer_cast<spdlog::sinks::rotating_file_sink_mt>( sink ) )
-            return r->filename();
-        if ( auto r = std::dynamic_pointer_cast<spdlog::sinks::rotating_file_sink_st>( sink ) )
-            return r->filename();
-        if ( auto r = std::dynamic_pointer_cast<spdlog::sinks::daily_file_sink_mt>( sink ) )
-            return r->filename();
-        if ( auto r = std::dynamic_pointer_cast<spdlog::sinks::daily_file_sink_st>( sink ) )
-            return r->filename();
-        if ( auto r = std::dynamic_pointer_cast<spdlog::sinks::basic_file_sink_mt>( sink ) )
-            return r->filename();
-        if ( auto r = std::dynamic_pointer_cast<spdlog::sinks::basic_file_sink_st>( sink ) )
-            return r->filename();
-    }
+    return logFilePath_;
+}
 
-    return {};
+void Logger::setLogFilePath( const std::filesystem::path& path )
+{
+    logFilePath_ = path;
 }
 
 Logger::Logger()
diff --git a/source/MRMesh/MRLog.h b/source/MRMesh/MRLog.h
index 9039ea6fa433..2728c5eacc1f 100644
--- a/source/MRMesh/MRLog.h
+++ b/source/MRMesh/MRLog.h
@@ -36,9 +36,13 @@ class MR_BIND_IGNORE Logger
 
     /// return filename of first found file sink, if there is no one, returns {}
     MRMESH_API std::filesystem::path getLogFileName() const;
+
+    /// set the current log file path (used when file sink is created)
+    MRMESH_API void setLogFilePath( const std::filesystem::path& path );
 private:
     Logger();
     std::shared_ptr<spdlog::logger> logger_;
+    std::filesystem::path logFilePath_;
 };
 
 /// \}
diff --git a/source/MRMesh/MRSystem.cpp b/source/MRMesh/MRSystem.cpp
index 0a0fc1a009d4..c915526a99db 100644
--- a/source/MRMesh/MRSystem.cpp
+++ b/source/MRMesh/MRSystem.cpp
@@ -607,6 +607,17 @@ void setupLoggerByDefault()
     std::time_t t = std::chrono::system_clock::to_time_t( now );
     auto fileName = GetTempDirectory();
     fileName /= "Logs";
+    // ensure Logs directory exists (spdlog does not create parent dirs)
+    {
+        std::error_code ec;
+        if ( !std::filesystem::is_directory( fileName, ec ) )
+        {
+            ec.clear();
+            std::filesystem::create_directories( fileName, ec );
+            if ( ec )
+                spdlog::error( "Failed to create logs directory {}: {}", utf8string( fileName ), systemToUtf8( ec.message() ) );
+        }
+    }
     removeOldLogs( fileName );
 
     fileName /= fmt::format( "MRLog_{:%Y-%m-%d_%H-%M-%S}_{}.txt", LocaltimeOrZero( t ),
@@ -616,6 +627,7 @@ void setupLoggerByDefault()
     file_sink->set_level( minLevel );
     file_sink->set_pattern( Logger::instance().getDefaultPattern() );
     Logger::instance().addSink( file_sink );
+    Logger::instance().setLogFilePath( fileName );
 
 #ifdef _WIN32
     auto msvc_sink = std::make_shared<spdlog::sinks::msvc_sink_mt>();