hyperledger/fabric · error

must supply channel ID

Error message

must supply channel ID

What it means

The (deprecated) create command validates that a channel ID was provided via the -c flag before doing anything. channelID defaults to the UndefinedParamValue sentinel, and if it is still unset the command cannot name the channel to create.

Source

Thrown at internal/peer/channel/create.go:233

				cf.DeliverClient.Close()
				cf, err = InitCmdFactory(EndorserNotRequired, PeerDeliverNotRequired, OrdererRequired)
				if err != nil {
					return nil, errors.WithMessage(err, "failed connecting")
				}
				time.Sleep(200 * time.Millisecond)
			} else {
				cf.DeliverClient.Close()
				return block, nil
			}
		}
	}
}

// deprecated
func create(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {
	// the global chainID filled by the "-c" command
	if channelID == common.UndefinedParamValue {
		return errors.New("must supply channel ID")
	}

	// Parsing of the command line is done so silence cmd usage
	cmd.SilenceUsage = true

	var err error
	if cf == nil {
		cf, err = InitCmdFactory(EndorserNotRequired, PeerDeliverNotRequired, OrdererRequired)
		if err != nil {
			return err
		}
	}
	return executeCreate(cf)
}

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Re-run with the channel name: peer channel create -c <channel-name> -f <tx> -o <orderer:port>
2. Ensure the channel name is non-empty and matches the one used in configtxgen -channelID.
3. In automation, assert the variable is set before invoking.

Example fix

// before
peer channel create -f ./channel-artifacts/mychannel.tx -o orderer:7050
// after
peer channel create -c mychannel -f ./channel-artifacts/mychannel.tx -o orderer:7050

if [ -z "$CHANNEL_NAME" ]; then echo "error: -c channel ID required" >&2; exit 1; fi
peer channel create -c "$CHANNEL_NAME" -f mychannel.tx -o orderer:7050

When it happens

Trigger: Running `peer channel create` without -c/--channelID, or with -c "".

Common situations: Omitting the flag in scripts; -c holding the tx-config path by mistake; variable interpolation leaving the channel name empty; older tutorials mixing -c (channel) with -f ordering.

Understand the failure class

Background: "--flag is required" and "must specify" CLI errors: how missing-required-flag validation works and how to fix it — this error's family across 20 libraries.

Related errors

• The required parameter 'channelID' is empty. Rerun the comma
• The required parameter 'channelID' is empty. Rerun the comma
• fetch target required, oldest, newest, config, or a number
• trailing args detected
• fetch target illegal: %s

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/4b2ef11a63d10064. Report an issue: GitHub.