diff --git a/static/js/dicomViewer.js b/static/js/dicomViewer.js
index b8cf474e..6aff7a08 100644
--- a/static/js/dicomViewer.js
+++ b/static/js/dicomViewer.js
@@ -705,7 +705,7 @@ export function loadCornerstone(main_element, db, images, annotations_to_load, l
 }
 
 function loadCornerstoneMainImage(element, image, stack, db, load_as_stack) {
-    dumpDataSet(image.data)
+    //dumpDataSet(image.data)
     console.log("loadCornerstoneMainImage")
     console.log("load as stack:", load_as_stack)
     // It is probably silly to do this each time we load a question
@@ -904,7 +904,13 @@ async function loadAltDicomInterface(db) {
 function onImageRendered(e) {
     const eventData = e.detail;
     //console.log(e);
-    dumpDataSet(eventData.image.data)
+    try {
+        // todo improve
+        dumpDataSet(eventData.image.data);
+    } catch {
+        console.log("unable to extract dicom data")
+
+    }
 
     // Update ww/wl
     $("#wc").text(Math.round(eventData.viewport.voi.windowCenter));