order post tx "--generate-only" can't create

[nodebreaker0-0]

@alessio

dexcli tx order post cosmos1zjke9jp4rftfzs6nw73ut94jzl3qgk95mhdmyx 1 BID 1000000000000000000 1000000000000000000 100 --chain-id=testchain --generate-only

ERROR: accepts 5 arg(s), received 6

dexcli tx order post --from cosmos1zjke9jp4rftfzs6nw73ut94jzl3qgk95mhdmyx 1 BID 1000000000000000000 1000000000000000000 100 --chain-id=testchain --generate-only

ERROR: no RPC client defined

Unable to generate when generating json to sign order post tx offline.
Defined in msg but cannot be processed in dexcli

https://github.com/tendermint/dex-demo/blob/master/pkg/cliutil/cli.go#L15

	accGetter := authtypes.NewAccountRetriever(cliCtx)
	if err := accGetter.EnsureExists(cliCtx.GetFromAddress()); err != nil {
		return context.CLIContext{}, authtypes.TxBuilder{}, err
	}

This part seems to be the cause, what is its use?