hyperledger/fabric · error

error writing channel create tx: %s

Error message

error writing channel create tx: %s

What it means

Returned by doOutputChannelCreateTx when writeFile fails to write the marshaled channel-creation transaction envelope to the specified output file. The configtx was generated correctly; the error comes from the file write itself (bad path, permissions, I/O failure).

Source

Thrown at cmd/configtxgen/main.go:74

func doOutputChannelCreateTx(conf, baseProfile *genesisconfig.Profile, channelID string, outputChannelCreateTx string) error {
	logger.Info("Generating new channel configtx")

	var configtx *cb.Envelope
	var err error
	if baseProfile == nil {
		configtx, err = encoder.MakeChannelCreationTransaction(channelID, nil, conf)
	} else {
		configtx, err = encoder.MakeChannelCreationTransactionWithSystemChannelContext(channelID, nil, conf, baseProfile)
	}
	if err != nil {
		return err
	}

	logger.Info("Writing new channel tx")
	err = writeFile(outputChannelCreateTx, protoutil.MarshalOrPanic(configtx), 0o640)
	if err != nil {
		return fmt.Errorf("error writing channel create tx: %s", err)
	}
	return nil
}

func doInspectBlock(inspectBlock string) error {
	logger.Info("Inspecting block")
	data, err := os.ReadFile(inspectBlock)
	if err != nil {
		return fmt.Errorf("could not read block %s", inspectBlock)
	}

	logger.Info("Parsing genesis block")
	block, err := protoutil.UnmarshalBlock(data)
	if err != nil {
		return fmt.Errorf("error unmarshalling to block: %s", err)
	}
	err = protolator.DeepMarshalJSON(os.Stdout, block)
	if err != nil {

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Verify the output path is writable and its parent directory exists
2. Inspect the wrapped error for the actual OS-level cause (permission, ENOSPC, read-only FS)

When it happens

Trigger: Thrown at cmd/configtxgen/main.go:74 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/3c2a06f358fa2fb7. Report an issue: GitHub.