diff --git a/dakota_interface.py b/dakota_interface.py
index 1d4b45f..f605544 100644
--- a/dakota_interface.py
+++ b/dakota_interface.py
@@ -64,7 +64,9 @@ def interface(fn_json_args):
         analysis = interface_args['analysis']
         ppcmd = interface_args['prevabs_cmd']
         solver = interface_args['solver']
-        scrnout = interface_args['scrnout']
+        scrnout = False
+        if 'scrnout' in interface_args.keys():
+            scrnout = interface_args['scrnout']
         ms = sga.solve(fn_main, analysis, ppcmd, solver, scrnout=scrnout)