ErrLookup › n8n-io/n8n
n8n-io/n8n
Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations. · TypeScript · 11,817 source files
Analyzed at 33eb5c196e on 2026-09-05. 1097 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| No credential template for type | exception | error | credentials, seeder, eval-config, registry, developer-error |
| Invalid discovery test case | exception | error | discovery, test-case-config, zod, schema, validation, authoring |
| Bad Gateway | http | error | projects, conflicts, catalog-anomaly, memberships |
| --build-via-mcp requires LangSmith experiment tracking —… | exception | error | cli, environment, langsmith, instance-ai, secrets |
| LLM doesn't support binding tools | exception | error | llm, langchain, evaluations, llm-judge, types |
| LANGSMITH_API_KEY is not set — the AIA arm needs LangSmith… | exception | error | cli, environment, langsmith, instance-ai, secrets, cost-report |
| expectedToolInvocations must specify a non-empty `anyOf`… | exception | error | discovery, validation, test-config, defensive-check, developer-error |
| Seeding failed | exception | error | seeding, error-wrapping, framework, framework-issue |
| Unknown flag | exception | error | cli, argument-parsing, configuration, developer-error |
| --delete-prebuilt-workflows applies to… | exception | error | cli, argument-validation, instance-ai, evaluations |
| " " escapes | exception | error | path-traversal, security, sandbox, scenario-config, validation |
| () requires , but received . | exception | error | workflow-builder, validation, typescript, typeerror |
| Found multiple eval-results entries for test case slug | exception | error | eval-results, artifact, data-integrity, duplicate, configuration |
| ${error.message} | exception | error | openai, router, error-wrapper, catch-all, v1 |
| Unhandled seed mode | exception | critical | discriminated-union, exhaustiveness, framework, seeding |
| Expression evaluation failed | exception | error | expression-runtime, isolate, catch-all, runtime-error |
| Existing manifest at | exception | error | json, validation, manifest, filesystem, data-integrity, build-mcp-manifest |
| (): all array elements must be numbers | exception | error | expression-runtime, array-extensions, numeric, type-coercion, sum-min-max-average |
| merge(): expected object arg | exception | error | expression-runtime, array-extensions, merge, argument-validation, defensive |
| The loop formed by must be entered only through its Split… | exception | error | workflow-graph, loop, split-in-batches, conversion, validation |
| Failed to parse discovery test case | exception | error | discovery, test-case-config, json, validation, authoring |
| Cannot use given entity id | exception | error | composite-key, primary-key, find, runtime |
invalid_request invalid_request | http | error | engine, http, validation, zod, request-schema |
| no artifact handler registered for type | exception | error | registry, artifact, type-system, exhaustiveness |
| Unexpected positional argument | exception | warning | cli, argument-parsing, usage |
| Failed to obtain token for MCP server | exception | critical | mcp, authentication, azure-ad, microsoft-365, token |
| The file " " is MB, which exceeds the MB limit for passing… | exception | error | langchain, agent, tools-agent, binary, size-limit, configuration, env |
| Isolate for this caller is no longer available | exception | error | expression-runtime, isolate, oom-recovery, lifecycle, per-execution |
| ${formatSkillValidationErrors(validation.errors)} | exception | error | skills, validation |
| Unsupported FindOperator | exception | error | query-builder, find-operator, where, typeerror |
404 Credential to be updated not found. You can only update credentials owned by you | exception | error | credentials, update, rbac, rest-api, not-found, authorization |
| Maximum number of users reached | exception | error | auth, license, invitation, users-quota, forbidden |
| Found multiple eval-results entries for test case | exception | error | eval-results, artifact, data-integrity, duplicate, configuration |
| Expression exceeded memory limit of | exception | error | expression-runtime, isolate, memory, resource-limit, oom |
| Failed to write " ": ; command fallback failed | exception | error | sandbox, filesystem, write, quota, instance-ai, fallback |
| Missing value for --scenario | exception | error | cli, argument-parsing, verifier-export, configuration, developer-error |
| Access denied: cannot access | exception | error | filesystem, security, computer-use |
| Edge → leaves output slot ; only output slot 0 is supported… | exception | error | engine, graph-validation, unimplemented, branching |
| Node has more than one edge into input slot ; converging… | exception | error | engine, graph-validation, unimplemented, convergence |
| Seed declares two agents with id | exception | error | seed-fixture, agent, validation, id-uniqueness |
| Timeout waiting for lock SqliteWriteConnectionMutex to… | exception | error | sqlite, concurrency, locking, timeout, database |
| eval-results.json does not include a workflowId and… | exception | error | eval-results, verifier, test-case, data-lookup |
| Missing value for | exception | error | cli, argument-parsing, verifier-export, configuration, developer-error |
| Run is not suspended. Cannot resume. | exception | warning | run-state, resume, race-condition, hitl, human-in-the-loop |
| Unsupported syntax: 'Dynamic property access' is not… | exception | error | sdk-interpreter, dynamic-access, computed-property, security |
| Method ' ' is not an allowed SDK method. Allowed methods: … | exception | error | sdk-interpreter, method-allowlist, native-methods, security |
| Invalid date format | exception | error | validation, date, configuration, chat-trigger, wait-time |
| Thread not found in project " " across workspace(s): . The… | exception | error | langsmith, thread, trace-retention, workspace-discovery |
| Unsupported syntax: 'Destructuring in variable declaration'… | exception | error | sdk-interpreter, destructuring, variable-declaration |
| No binary data exists on item! | validation | error | openai, image, binary-data, dead-code, v1, bug |
| Invalid nps survey state structure | exception | warning | validation, user-settings, nps-survey, rest-api, bad-request |
| Access denied: " " is excluded from filesystem reads | exception | warning | filesystem, security, validation, computer-use |
| String pattern accessing | exception | error | task-runner, python, security, sandbox, format-string, code-node |
| The opening turn attaches seeded workflow | exception | error | seeding, workflow, attachment, test-fidelity |
| Expression timed out after | exception | error | expression-runtime, isolate, timeout, resource-limit |
| Failed to initialize Chroma collection | exception | error | chromadb, vector-store, invariant-check, operational-error, langchain |
| The credential with ID | exception | error | cli, import, workflow, ownership, conflict, user-error |
| GATEWAY_CONFIRMATION_REQUIRED | exception | info | permissions, control-flow, computer-use |
EXECUTE_WORKFLOW_INVALID_INPUT_MAPPING has an invalid . When parameters.workflowInputs.mappingMode is ' ', an… | validation | error | execute-workflow, validator, resource-mapper, mapping |
| LangSmith workspace " " not found among [ ]. Check… | exception | error | langsmith, workspace, permissions, env |
| MCP tool " " from conflicts with | validation | warning | mcp, validation, naming, conflict, tool-registry |
SDK_PLACEHOLDER_WRAPPED Do not wrap placeholder() in expr(). Use placeholder('hint') directly as the… | error_code | error | sdk-lint, workflow-sdk, placeholder, expr, agent-guidance, builder-code |
| Custom entity repository | exception | error | typeorm, custom-repository, decorators, api-misuse |
| No test cases match --tier | exception | error | cli, argument-parsing, tier-filter, configuration, developer-error |
| Column " " was not found in table | exception | error | typeorm, aggregates, metadata, api-misuse |
| LangSmith runs/query failed | exception | error | network, langsmith, http, rate-limiting, instance-ai, cost-report |
| Delegated child input is missing or invalid | exception | error | cancellation, delegate-tool, serialization, schema-validation |
| No computer-use daemon is paired with this n8n… | exception | error | daemon, computer-use, pairing, configuration, developer-error |
| Observational memory requires a storage backend that… | exception | error | memory, observational, storage, validation |
| Unsupported unit ' '. Supported: '`).join(', ')}. | exception | error | expression, date, units, validation |
| Failed to spawn daemon | exception | error | daemon, computer-use, spawn, enoent, environment, debugging |
| Invalid skill at | exception | error | skills, validation, configuration, frontmatter |
| Execution is already being resumed by another process | exception | warning | multi-main, execution, concurrency, queue-mode |
| ' ' is a reserved SDK function name and cannot be used as a… | exception | error | sdk-interpreter, naming, reserved-words, security |
TOOL_NO_PARAMETERS ' ' has no parameters set. | validation | error | |
| Daemon spawned (pid ) but did not pair within s. Check for… | exception | error | daemon, computer-use, pairing, timeout, debugging |
| No runs for thread in LangSmith project " " — the trace may… | exception | error | langsmith, eval-harness, trace-expiry, configuration |
| Invalid file_ids type | exception | error | openai, assistant, file-ids, type-validation, unexpected, v1 |
| The operation " " is not supported! | exception | error | configuration, node-parameters, router, anthropic |
| Error on node " " which is connected via input | exception | error | |
| LangSmith sessions lookup failed | exception | error | network, langsmith, http, instance-ai, cost-report |
| Unexpected positional argument | exception | error | cli, argument-validation, security, instance-ai |
| Invalid delegate sub-agent tool name | exception | error | validation, delegate-tool, naming, configuration |
| The function " " is not supported in the Code Node | exception | error | task-runner, code-node, rpc, unsupported-api |
| workflow() third argument is settings, not workflow… | exception | error | workflow-builder, factory, api-misuse, validation |
| Property " " was not found in " ". Make sure your query is… | exception | error | typeorm, find-options, relations, nested, metadata |
| Telemetry tracer must implement startSpan() and… | exception | error | telemetry, opentelemetry, configuration, type-mismatch |
| . This is most likely because some of your tools are… | exception | error | langchain, agent, tool-schema, configuration |
| Local computer-use build not found at | exception | error | daemon, computer-use, build, monorepo, configuration |
| Task failed: [ ] | exception | error | video-generation, async-task, polling, alibabacloud, dashscope |
| --iterations must be >= 1 | exception | error | cli, argument-validation, instance-ai, mcp-manifest |
| Security violation detected | exception | error | task-runner, python, security, sandbox, import, configuration |
SET_INVALID_ASSIGNMENT has invalid assignments. Expected parameters.assignments to be an object… | validation | error | |
| Cannot pass an OutputSelector to . | exception | error | workflow-builder, output-selector, connections, api-misuse |
| only take effect with --build-via-mcp — pass it, or drop… | exception | error | cli, argument-validation, instance-ai, evaluations |
| Nodes from fromJSON() do not support to() | exception | error | workflow-builder, fromjson, import, connections |
| Invalid Qdrant point id | exception | error | qdrant, validation, ids, vector-store |
| Path " " escapes the base directory | exception | error | filesystem, security, computer-use |
| Pre-seeding created data table(s) but the case declares … | exception | error | data-table, seeding, invariant, restore |
SDK_UNSOLICITED_STICKY Do not add sticky() / stickyNote nodes unless the user explicitly asked for… | error_code | warning | sdk-lint, workflow-sdk, sticky-note, ux, agent-guidance, builder-code |