Fixed hNoAssocCls by moving check if clusters are nullptr inside the loop over tracks.

src/modules/DUTAssociation/DUTAssociation.cpp

@@ -83,16 +83,18 @@ StatusCode DUTAssociation::run(std::shared_ptr<Clipboard> clipboard) {
 
     // Get the DUT clusters from the clipboard
     Clusters* clusters = reinterpret_cast<Clusters*>(clipboard->get(m_detector->name(), "clusters"));
-    if(clusters == nullptr) {
-        LOG(DEBUG) << "No DUT clusters on the clipboard";
-        return StatusCode::Success;
-    }
 
     // Loop over all tracks
     for(auto& track : (*tracks)) {
         int assoc_cls_per_track = 0;
         auto min_distance = std::numeric_limits<double>::max();
 
+        if(clusters == nullptr) {
+            hNoAssocCls->Fill(0);
+            LOG(DEBUG) << "No DUT clusters on the clipboard";
+            continue;
+        }
+
         // Loop over all DUT clusters
         for(auto& cluster : (*clusters)) {
             // Check distance between track and cluster