diff --git a/msc/coredb_clone_hybrid.py b/msc/coredb_clone_hybrid.py
index 30c2ef06f2fd91f2433c830424ae7f2a6de531c4..810e04fb1e162996326005e7341e0371698b2ea3 100644
--- a/msc/coredb_clone_hybrid.py
+++ b/msc/coredb_clone_hybrid.py
@@ -6,10 +6,11 @@ FZ 09/2021
 """
 
 from watpy.coredb.coredb import *
+import os # mkdirs
 
-import os
 db_path = './CoRe_DB_clone/'
 os.makedirs(db_path, exist_ok=True)
+
 cdb = CoRe_db(db_path, ifile = "json/DB_Hyb.json")
 idb = cdb.idb
 
diff --git a/msc/coredb_write_index_json.py b/msc/coredb_write_index_json.py
index 27b3514fcc3446ee4cec924a355a64868ee2d7ab..926c4530537a7df77bd0e534c56fa4cf2dbbbd01 100644
--- a/msc/coredb_write_index_json.py
+++ b/msc/coredb_write_index_json.py
@@ -6,10 +6,12 @@ SB 09/2021
 """
 
 from watpy.coredb.coredb import *
+import os # mkdirs
 
 db_path = './CoRe_DB_clone/'
+os.makedirs(db_path, exist_ok=True)
+
 cdb = CoRe_db(db_path)
-## cdb = CoRe_db(db_path, ifile = "json/DB_Hyb.json")  #Use this for Hybrids!
 idb = cdb.idb
 
 # make sure the DB is up-to-date!
@@ -25,5 +27,3 @@ idb.update_from_mdlist(mdlist)
 
 # write the index to JSON with the appropriate template 
 idb.to_json_tmplk()
-## idb.to_json_tmplk(tmpl = TXT_HYB)  #Use this for Hybrids!
-
diff --git a/msc/coredb_write_index_json_hybrid.py b/msc/coredb_write_index_json_hybrid.py
new file mode 100644
index 0000000000000000000000000000000000000000..b16db297a923467adba1209a468d79ec95640b82
--- /dev/null
+++ b/msc/coredb_write_index_json_hybrid.py
@@ -0,0 +1,29 @@
+#!/usr/bin/python
+
+"""
+Write the index JSON from the metadata_main.txt in the DB
+SB 09/2021
+"""
+
+from watpy.coredb.coredb import *
+import os # mkdirs
+
+db_path = './CoRe_DB_clone/'
+os.makedirs(db_path, exist_ok=True)
+
+cdb = CoRe_db(db_path, ifile = "json/DB_Hyb.json") #Use this for Hybrids!
+idb = cdb.idb
+
+# make sure the DB is up-to-date!
+cdb.sync()
+
+# read metadata_main in a list
+mdlist = []
+for key in idb.dbkeys:
+    mdlist.append(cdb.sim[key].md)
+
+# update the index 
+idb.update_from_mdlist(mdlist)
+
+# write the index to JSON with the appropriate template 
+idb.to_json_tmplk(tmpl = TXT_HYB)  #Use this for Hybrids!