diff --git a/sarif_cli/scan_tables.py b/sarif_cli/scan_tables.py
index 0613d82..28d02bc 100644
--- a/sarif_cli/scan_tables.py
+++ b/sarif_cli/scan_tables.py
@@ -91,7 +91,7 @@ def joins_for_projects(basetables, external_info):
         e.project_id = hash.hash_unique((repoUri+extra).encode())
     else:
         repoUri = "unknown"
-    
+
     res = pd.DataFrame(data={
         "id"                 : e.project_id,
         "project_name"       : repoUri,
diff --git a/sarif_cli/signature.py b/sarif_cli/signature.py
index c668a1d..e3d3f1e 100644
--- a/sarif_cli/signature.py
+++ b/sarif_cli/signature.py
@@ -56,6 +56,8 @@ def _signature_dict(args, elem, context: Context):
     if args.typedef_signatures:
         # Give every unique struct a name and use a reference to it as value.
         if signature not in context.sig_to_typedef:
+            #cannot have leading 0 hashes later in table joins so replace now
+            #context.sig_to_typedef[signature] = str("Struct%04d" % shorthash(signature)).replace("0", "1")
             context.sig_to_typedef[signature] = "Struct%04d" % shorthash(signature)
         typedef = context.sig_to_typedef[signature]
         return typedef
@@ -82,6 +84,8 @@ def _signature_list(args, elem, context):
     if args.typedef_signatures:
         # Give every unique array a name and use a reference to it as value.
         if signature not in context.sig_to_typedef:
+            #cannot have leading 0 hashes later in table joins so replace now
+            #context.sig_to_typedef[signature] = str("Array%04d" % shorthash(signature)).replace("0", "1")
             context.sig_to_typedef[signature] = "Array%04d" % shorthash(signature)
         typedef = context.sig_to_typedef[signature]
         return typedef
diff --git a/sarif_cli/table_joins.py b/sarif_cli/table_joins.py
index 41c5faa..520f0c6 100644
--- a/sarif_cli/table_joins.py
+++ b/sarif_cli/table_joins.py
@@ -115,6 +115,8 @@ def joins_for_problem(tgraph, af_0350_location):
     # 
     # Form the message dataframe (@kind problem) via joins
     # 
+    import IPython
+    IPython.embed(header="spot 1")
 
     kind_problem_1 = (
         aft(6343)