diff --git a/atlas/api.py b/atlas/api.py
index 0272635f..477aa54e 100644
--- a/atlas/api.py
+++ b/atlas/api.py
@@ -70,8 +70,10 @@ def upload_dicom(request, files: List[UploadedFile] = File(...)):
         except DuplicateDicom as e:
             duplicate.append((file.name, ud.image_blake3_hash))
 
-            duplicate_series.add(e.duplicate.get_series().get_absolute_url())
-            print(duplicate_series)
+
+            if type(e.duplicate) == SeriesImage:
+                duplicate_series.add(e.duplicate.series.get_absolute_url())
+
             pass
         except InvalidDicomError:
             failed.append(file.name)
diff --git a/atlas/models.py b/atlas/models.py
index f0901c97..edb848a1 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -1304,8 +1304,7 @@ class UncategorisedDicom(models.Model):
             try:
                 self.series_instance_uid = ds["SeriesInstanceUID"].value
             except AttributeError:
-                # ? only called with invalid dicom?
-                self.series_instance_uid = ds["SeriesInstanceUID"]
+                raise InvalidDicomError("Invalid dicom file")
 
             # if self.check_for_duplicates():
             #    return DuplicateDicom
@@ -1333,6 +1332,8 @@ class UncategorisedDicom(models.Model):
             ds = pydicom.dcmread(self.image)
             return ds
         except pydicom.errors.InvalidDicomError:
+            print("Error getting dicom dataset")
+            print(self.image)
             return {"SeriesInstanceUID": "1234"}
 
     def get_basic_dicom_tags(self, dataset=None):
diff --git a/helpers/images.py b/helpers/images.py
index f87d907f..f23f567c 100644
--- a/helpers/images.py
+++ b/helpers/images.py
@@ -9,6 +9,7 @@ from PIL import Image, ImageFile
 from blake3 import blake3
 
 import pydicom
+from pydicom.errors import InvalidDicomError
 import sys
 import glob
 
@@ -178,7 +179,13 @@ def get_image_dicom_hash(img, dataset=None, hash_type="md5", direct_pixel_data=T
             raise NotImplemented
 
     if direct_pixel_data:
-        hasher.update(dataset.PixelData)
+        try:
+            hasher.update(dataset.PixelData)
+        except AttributeError as e:
+            print("Error getting pixel data hash from dataset")
+            print(dataset)
+            raise InvalidDicomError("Error getting pixel data hash from dataset")
+
     else:
         first = True
         for i in dataset.pixel_array.astype(str).flatten():