From aac61165d5536d5bbbe5e7d59b8a7b4f0c65af06 Mon Sep 17 00:00:00 2001
From: Jacek Sieka <jacek@status.im>
Date: Wed, 16 Nov 2022 10:12:50 +0100
Subject: [PATCH] ncli_db: better error message on missing history

---
 ncli/ncli_db.nim | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ncli/ncli_db.nim b/ncli/ncli_db.nim
index 2d0173f90..939bbc390 100644
--- a/ncli/ncli_db.nim
+++ b/ncli/ncli_db.nim
@@ -536,7 +536,9 @@ proc cmdExportEra(conf: DbConf, cfg: RuntimeConfig) =
         dag.withUpdatedState(tmpState[], eraBid) do:
           withState(state):
             group.finish(e2, forkyState.data).get()
-        do: raiseAssert "withUpdatedState failed"
+        do:
+          echo "Unable to load historical state - export requires fully indexed history node - see https://nimbus.guide/trusted-node-sync.html#recreate-historical-state-access-indices"
+          quit 1
 
     era += 1