Add :nbstart and :nbclose.
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index fd7471d..ff39040 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -439,7 +439,9 @@
 # define ex_wsverb		ex_ni
 #endif
 #ifndef FEAT_NETBEANS_INTG
+# define ex_nbclose		ex_ni
 # define ex_nbkey		ex_ni
+# define ex_nbstart		ex_ni
 #endif
 
 #ifndef FEAT_EVAL