diff --git a/GPU_version/vio/src/frame_handler_mono.cpp b/GPU_version/vio/src/frame_handler_mono.cpp
index a4d4fe4..213b1a4 100644
--- a/GPU_version/vio/src/frame_handler_mono.cpp
+++ b/GPU_version/vio/src/frame_handler_mono.cpp
@@ -171,7 +171,7 @@ FrameHandlerBase::UpdateResult FrameHandlerMono::processFrame()
   SparseImgAlignGpu img_align(Config::kltMaxLevel(), Config::kltMinLevel(),30, SparseImgAlignGpu::GaussNewton, false,gpu_fast_);
   if(img_align.run(last_frame_, new_frame_)==0)return  RESULT_FAILURE;
   reprojector_.reprojectMap(new_frame_, overlap_kfs_);
-  // assert // TODO
+  assert (false);
 /*
   std::cout<<"Reprojection Map nPoint: "<<overlap_kfs_.back().second
              <<"\tnCell: "<<reprojector_.n_trials_<<"\t nMatches: "<<reprojector_.n_matches_