{"record":{"id":"62b8208e453db9ae","repo":"hashicorp/packer","slug":"there-is-no-iteration-associated-with-the-channel","errorCode":null,"errorMessage":"there is no iteration associated with the channel %s","messagePattern":"there is no iteration associated with the channel (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"datasource/hcp-packer-image/data.go","lineNumber":176,"sourceCode":"\t\titer, err := cli.GetIteration(ctx, d.config.Bucket, hcpapi.GetIteration_byID(d.config.IterationID))\n\t\tif err != nil {\n\t\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\n\t\t\t\t\"error retrieving image iteration from HCP Packer registry: %s\",\n\t\t\t\terr)\n\t\t}\n\t\titeration = iter\n\t} else {\n\t\tlog.Printf(\"[INFO] Reading info from HCP Packer registry (%s) [project_id=%s, organization_id=%s, channel=%s]\",\n\t\t\td.config.Bucket, cli.ProjectID, cli.OrganizationID, d.config.Channel)\n\n\t\tchannel, err := cli.GetChannel(ctx, d.config.Bucket, d.config.Channel)\n\t\tif err != nil {\n\t\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\"error retrieving \"+\n\t\t\t\t\"channel from HCP Packer registry: %s\", err.Error())\n\t\t}\n\n\t\tif channel.Iteration == nil {\n\t\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\"there is no iteration associated with the channel %s\",\n\t\t\t\td.config.Channel)\n\t\t}\n\t\tchannelID = channel.ID\n\t\titeration = channel.Iteration\n\t}\n\n\trevokeAt := time.Time(iteration.RevokeAt)\n\tif !revokeAt.IsZero() && revokeAt.Before(time.Now().UTC()) {\n\t\t// If RevokeAt is not a zero date and is before NOW, it means this iteration is revoked and should not be used\n\t\t// to build new images.\n\t\treturn cty.NullVal(cty.EmptyObject), fmt.Errorf(\"the iteration %s is revoked and can not be used on Packer builds\",\n\t\t\titeration.ID)\n\t}\n\n\tvar output DatasourceOutput\n\n\tcloudAndRegions := map[string][]string{}\n\tfor _, build := range iteration.Builds {","sourceCodeStart":158,"sourceCodeEnd":194,"githubUrl":"https://github.com/hashicorp/packer/blob/eb36e3c3e48a036f3e8cc94087636ee72e1303c9/datasource/hcp-packer-image/data.go#L158-L194","documentation":"The hcp-packer-image datasource fetched a channel from the HCP Packer registry, but the channel object returned had a nil Iteration pointer. This means the channel exists but has no iteration assigned to it yet. The datasource cannot resolve an image without an iteration, so it aborts and returns a null cty value.","triggerScenarios":"Calling packer build with an hcp-packer-image datasource configured with a `channel` whose channel in the HCP Packer registry has never been assigned an iteration (channel.Iteration == nil after cli.GetChannel succeeds).","commonSituations":"Creating a channel in the HCP Packer UI but never publishing/assigning an iteration to it; a typo in the channel name resolving to a different empty channel; a script or pipeline clearing the channel assignment before the build runs; using a channel in a project where the release was deleted.","solutions":["Assign an iteration to the channel in the HCP Packer registry (UI or `hcp packer channels` CLI) before building.","Verify the channel name in the datasource matches an existing channel with a release assigned.","Use `iteration_id` directly in the datasource instead of `channel` if you know the iteration.","Check that project_id/organization_id credentials point to the project containing the populated channel."],"exampleFix":"// before\nsource \"hcp\" {\n  datasource \"hcp-packer-image\" {\n    channel = \"prod\" // channel exists but has no iteration assigned\n  }\n}\n// after\n// In HCP: assign iteration to channel 'prod', or reference the iteration directly:\nsource \"hcp\" {\n  datasource \"hcp-packer-image\" {\n    iteration_id = \"01HXXXXXXXXXXXXXXXXXXX\"\n  }\n}","handlingStrategy":"validation","validationCode":"// Before building, confirm the channel has a release:\n// hcp packer channels list --bucket=my-app\n// hcp packer channels show <channel> --bucket=my-app  # must show an assigned iteration","typeGuard":null,"tryCatchPattern":"// In wrapper scripts:\nif packer init . && packer build -machine-readable template.pkr.hcl 2>&1 | grep -q 'there is no iteration associated with the channel'; then\n  echo \"Channel has no assigned iteration; publish a release first\" && exit 1\nfi","preventionTips":["Always publish an iteration to a channel immediately after creating it.","Pin CI builds to channels verified non-empty via the hcp CLI.","Use hcp-packer-iteration + hcp-packer-image chaining to reduce channel lookups.","Add a pre-build smoke step that resolves the datasource before long builds."],"tags":["hcp-packer","datasource","channel","registry"],"backgroundTag":"hcp-channel-no-iteration","analyzedSha":"eb36e3c3e48a036f3e8cc94087636ee72e1303c9","analyzedAt":"2026-09-05T13:20:43.127Z","contentChangedAt":"2026-09-05T13:20:43.127Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}