{"record":{"id":"3cc704099c33cc91","repo":"hyperledger/fabric","slug":"must-supply-channel-id-3cc704","errorCode":null,"errorMessage":"Must supply channel ID","messagePattern":"Must supply channel ID","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/peer/channel/update.go","lineNumber":40,"sourceCode":"\t\tShort: \"Send a configtx update.\",\n\t\tLong:  \"Signs and sends the supplied configtx update file to the channel. Requires '-f', '-o', '-c'.\",\n\t\tRunE: func(cmd *cobra.Command, args []string) error {\n\t\t\treturn update(cmd, args, cf)\n\t\t},\n\t}\n\tflagList := []string{\n\t\t\"channelID\",\n\t\t\"file\",\n\t}\n\tattachFlags(updateCmd, flagList)\n\n\treturn updateCmd\n}\n\nfunc update(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {\n\t// the global chainID filled by the \"-c\" command\n\tif channelID == common.UndefinedParamValue {\n\t\treturn errors.New(\"Must supply channel ID\")\n\t}\n\n\tif channelTxFile == \"\" {\n\t\treturn InvalidCreateTx(\"No configtx file name supplied\")\n\t}\n\t// Parsing of the command line is done so silence cmd usage\n\tcmd.SilenceUsage = true\n\n\tvar err error\n\tif cf == nil {\n\t\tcf, err = InitCmdFactory(EndorserNotRequired, PeerDeliverNotRequired, OrdererNotRequired)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tfileData, err := os.ReadFile(channelTxFile)\n\tif err != nil {","sourceCodeStart":22,"sourceCodeEnd":58,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/internal/peer/channel/update.go#L22-L58","documentation":"The update command requires a channel ID (the -c/--channelID flag) to know which channel's configuration to update. If channelID is still the undefined placeholder value, the command refuses to run before any network call is made. This is a plain argument-validation error.","triggerScenarios":"Running `peer channel update` without passing -c <channelID> (or setting CORE_PEER_CHANNEL_ID equivalent) so channelID equals the common.UndefinedParamValue empty placeholder.","commonSituations":"Copy-pasting an update command and dropping the -c flag; scripting the CLI where the channel variable is empty/unset; confusing update with fetch flags ordering.","solutions":["Add -c <channel-id> to the peer channel update command","Ensure the shell variable holding the channel name is non-empty before invoking the CLI","Double-check the command syntax: peer channel update -c mychannel -f updated_config.pb -o orderer:7050"],"exampleFix":"// before\npeer channel update -f updated_config.pb -o orderer:7050\n// after\npeer channel update -c mychannel -f updated_config.pb -o orderer:7050","handlingStrategy":"validation","validationCode":"// shell pre-check before invoking the CLI\nif [ -z \"$CHANNEL_ID\" ]; then echo \"error: CHANNEL_ID is required\"; exit 1; fi\npeer channel update -c \"$CHANNEL_ID\" -f \"$CONFIG_PB\" -o \"$ORDERER_ADDR\"","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Always pass -c explicitly on peer channel commands","Set CHANNEL_ID once at the top of scripts and assert non-empty","Use shellcheck or a wrapper script that validates required flags"],"tags":["cli","validation","hyperledger-fabric","missing-argument"],"backgroundTag":"missing-required-argument","analyzedSha":"2736b63f8fd5932511d56fe68b7039d15977f7f6","analyzedAt":"2026-09-04T08:52:36.465Z","contentChangedAt":"2026-09-04T08:52:36.465Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}