diff -up vim81/src/ex_docmd.c.backup vim81/src/ex_docmd.c
--- vim81/src/ex_docmd.c.backup	2019-01-22 17:35:28.701320672 +0100
+++ vim81/src/ex_docmd.c	2019-01-22 17:36:56.644540351 +0100
@@ -4793,6 +4793,7 @@ get_flags(exarg_T *eap)
     void
 ex_ni(exarg_T *eap)
 {
+    return;
     if (!eap->skip)
 	eap->errmsg = N_("E319: Sorry, the command is not available in this version");
 }