diff --git a/src/slic3r/GUI/AMSMaterialsSetting.cpp b/src/slic3r/GUI/AMSMaterialsSetting.cpp
index 4f6310271d..a00fcb527c 100644
--- a/src/slic3r/GUI/AMSMaterialsSetting.cpp
+++ b/src/slic3r/GUI/AMSMaterialsSetting.cpp
@@ -1023,8 +1023,10 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
         }
         else {
             Ams* selected_ams = this->obj->amsList[std::to_string(ams_id)];
-            AmsTray selected_tray = *selected_ams->trayList[std::to_string(tray_id)];
-            cali_select_idx = CalibUtils::get_selected_calib_idx(m_pa_profile_items, selected_tray.cali_idx);
+            if(!selected_ams) return;
+            AmsTray* selected_tray = selected_ams->trayList[std::to_string(tray_id)];
+            if(!selected_tray) return;
+            cali_select_idx = CalibUtils::get_selected_calib_idx(m_pa_profile_items, selected_tray->cali_idx);
             if (cali_select_idx >= 0) {
                 m_comboBox_cali_result->SetSelection(cali_select_idx);
             }