diff --git a/python/obitools3/dms/view/view.pyx b/python/obitools3/dms/view/view.pyx
index 9f1eed3..64e4c56 100755
--- a/python/obitools3/dms/view/view.pyx
+++ b/python/obitools3/dms/view/view.pyx
@@ -450,15 +450,14 @@ cdef class View(OBIWrapper) :
                     s+=invi_node_name_quotes
                     s+=b" [width=0, style=invis, shape=point]\n"
                     history.append(s)
-                    for input in level:
-                        # Connect all inputs to the invisible node
-                        for elt in input:
-                            s = b"\t"
-                            s = s+b"\""+elt+b"\""
-                            s+=b" -> "
-                            s+=invi_node_name_quotes
-                            s+=b" [arrowhead=none]\n"
-                            history.append(s)
+                    # Connect all inputs to the invisible node
+                    for elt in input:
+                        s = b"\t"
+                        s = s+b"\""+elt+b"\""
+                        s+=b" -> "
+                        s+=invi_node_name_quotes
+                        s+=b" [arrowhead=none]\n"
+                        history.append(s)
                     to_connect_to_command = invi_node_name_no_quotes
                 else:
                     to_connect_to_command = input[0]