diff --git a/services/webapp/code/rosetta/core_app/views.py b/services/webapp/code/rosetta/core_app/views.py
index 21687edb32af4057aa73d3941321277030703d8a..b8927d45ad6fe4d46295d62b8bbde15a669eeb27 100644
--- a/services/webapp/code/rosetta/core_app/views.py
+++ b/services/webapp/code/rosetta/core_app/views.py
@@ -517,6 +517,9 @@ def new_task(request):
         # Check that container required architecture is compatible with the computing resource
         # TODO: support setting the container runtime when creating the task
         # TODO: refactor and unroll this code
+        if data['task_computing'].supported_archs is None: data['task_computing'].supported_archs=[]
+        if data['task_computing'].emulated_archs is None: data['task_computing'].emulated_archs={}
+        
         if data['task_container'].image_arch:
             if (data['task_container'].image_arch != data['task_computing'].arch) and (data['task_container'].image_arch not in data['task_computing'].supported_archs):