--- a/jbrowse2.py	Thu Mar 28 09:15:57 2024 +0000
+++ b/jbrowse2.py	Thu Mar 28 10:31:07 2024 +0000
@@ -15,7 +15,7 @@
 import xml.etree.ElementTree as ET
 from collections import defaultdict
 
-logging.basicConfig(level=logging.INFO)
+logging.basicConfig(level=logging.DEBUG)
 log = logging.getLogger("jbrowse")
 
 JB2VER = "v2.10.3"
@@ -1343,17 +1343,16 @@
                 )
             # The view for the assembly we're adding
             view_json = {"type": "LinearGenomeView", "tracks": tracks_data}
-            refName = None
+            refName = self.assmeta[gnome][0].get("genome_firstcontig", None)
             drdict = {
                 "reversed": False,
                 "assemblyName": gnome,
                 "start": 1,
                 "end": 100000,
-                "refName": "x",
+                "refName": refName
             }
-
-            if default_data.get("defaultLocation", ""):
-                ddl = default_data["defaultLocation"]
+            ddl = default_data.get("defaultLocation", None)
+            if ddl:
                 loc_match = re.search(r"^([^:]+):([\d,]*)\.*([\d,]*)$", ddl)
                 # allow commas like 100,000 but ignore as integer
                 if loc_match:
@@ -1368,8 +1367,6 @@
                         "@@@ regexp could not match contig:start..end in the supplied location %s - please fix"
                         % ddl
                     )
-            else:
-                drdict["refName"] = gnome
             if drdict.get("refName", None):
                 # TODO displayedRegions is not just zooming to the region, it hides the rest of the chromosome
                 view_json["displayedRegions"] = [