{"record":{"id":"8f41a5e39d180749","repo":"hyperledger/fabric","slug":"error-writing-genesis-block-s","errorCode":null,"errorMessage":"error writing genesis block: %s","messagePattern":"error writing genesis block: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/configtxgen/main.go","lineNumber":52,"sourceCode":"\t\treturn errors.WithMessage(err, \"could not create bootstrapper\")\n\t}\n\tlogger.Info(\"Generating genesis block\")\n\tif config.Orderer == nil {\n\t\treturn errors.New(\"refusing to generate block which is missing orderer section\")\n\t}\n\tif config.Consortiums != nil {\n\t\tlogger.Error(\"Warning: 'Consortiums' should be nil since system channel is no longer supported in Fabric v3.x\")\n\t} else {\n\t\tif config.Application == nil {\n\t\t\treturn errors.New(\"refusing to generate application channel block which is missing application section\")\n\t\t}\n\t\tlogger.Info(\"Creating application channel genesis block\")\n\t}\n\tgenesisBlock := pgen.GenesisBlockForChannel(channelID)\n\tlogger.Info(\"Writing genesis block\")\n\terr = writeFile(outputBlock, protoutil.MarshalOrPanic(genesisBlock), 0o640)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"error writing genesis block: %s\", err)\n\t}\n\treturn nil\n}\n\nfunc doOutputChannelCreateTx(conf, baseProfile *genesisconfig.Profile, channelID string, outputChannelCreateTx string) error {\n\tlogger.Info(\"Generating new channel configtx\")\n\n\tvar configtx *cb.Envelope\n\tvar err error\n\tif baseProfile == nil {\n\t\tconfigtx, err = encoder.MakeChannelCreationTransaction(channelID, nil, conf)\n\t} else {\n\t\tconfigtx, err = encoder.MakeChannelCreationTransactionWithSystemChannelContext(channelID, nil, conf, baseProfile)\n\t}\n\tif err != nil {\n\t\treturn err\n\t}\n","sourceCodeStart":34,"sourceCodeEnd":70,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/cmd/configtxgen/main.go#L34-L70","documentation":"Returned by doOutputBlock when writeFile fails to persist the generated genesis block to the output path — the block was built successfully, but the filesystem write (permissions, unwritable directory, disk error) failed. The underlying OS error is interpolated into the message.","triggerScenarios":"Thrown at cmd/configtxgen/main.go:52 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check that the output directory exists and the process has write permission","Free disk space or resolve the cause shown in the wrapped error","Pass a valid writable file path via -outputBlock"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"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"}