diff --git a/bin/cmo_abra b/bin/cmo_abra
index cec3cc3..f3d991a 100755
--- a/bin/cmo_abra
+++ b/bin/cmo_abra
@@ -120,8 +120,10 @@ def convert_default_variables(parser):
             del args.working
             del args.bwa_ref
     except:#default version
-        del args.working
-        del args.bwa_ref
+        if 'working' in args:
+            del args.working
+        if 'bwa_ref' in args: 
+            del args.bwa_ref
 
     if not args.targets:
         args.targets = cmo.util.targets['abra'][args.ref]
diff --git a/bin/cmo_qcpdf b/bin/cmo_qcpdf
index c19712c..be5be8d 100755
--- a/bin/cmo_qcpdf
+++ b/bin/cmo_qcpdf
@@ -47,7 +47,6 @@ if __name__ == "__main__":
     parser.add_argument("--duplication-threshold", type=int, default="50")
     parser.add_argument("--cov-warn-threshold", type=int, default="50")
     parser.add_argument("--cov-fail-threshold", type=int, default="25")
-
     parser.add_argument("--version", default="0.5.8", choices=cmo.util.programs['roslin-qc'].keys())
     args = parser.parse_args()
 #    script = os.path.join(cmo.util.programs['roslin-qc'][args.version], "generate_pdf.py")
diff --git a/cmo/_version.py b/cmo/_version.py
index 74ac165..760a8b4 100644
--- a/cmo/_version.py
+++ b/cmo/_version.py
@@ -4,5 +4,5 @@
 
 
 
-__version__ = '1.9.2'
+__version__ = '1.9.3'