lib: Improve error message for the developer

I keep getting people asking me about what to do
when this error is generated when they are programming
new cli.  Maybe this is a bit better bread-crumb?

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/command.c b/lib/command.c
index cc597952e4..8ef9fae832 100644
--- a/lib/command.c
+++ b/lib/command.c
@@ -324,6 +324,7 @@ install_element (enum node_type ntype, struct cmd_element *cmd)
     {
       fprintf (stderr, "Command node %d doesn't exist, please check it\n",
                ntype);
+      fprintf (stderr, "Have you called install_node before this install_element?\n");
       exit (EXIT_FAILURE);
     }
 
@@ -371,6 +372,7 @@ uninstall_element (enum node_type ntype, struct cmd_element *cmd)
     {
       fprintf (stderr, "Command node %d doesn't exist, please check it\n",
                ntype);
+      fprintf (stderr, "Have you called install_node before this install_element?\n");
       exit (EXIT_FAILURE);
     }