Unable to open Workflow in designer view

[sadanandan28-cloud]

Severity

P1 - Critical (Blocking production)

Describe the Bug with repro steps

Does this occur consistently?
Repro steps:

Action: azureLogicAppsStandard.startDesignTimeApi
Error type: undefined
Error message: Unknown Error
Correlation Id: F2374362-A82A-462A-BE52-DD0BA8750665
Session id: 9bda20e0-eb20-458d-8b81-789fe8b78c4b1775538288939
Extension version: 5.230.15
Extension bundle version: 1.160.21
OS: win32 (Windows_NT 10.0.26100)
OS arch: x64
Product: Visual Studio Code
Product version: 1.106.3
UTC time: Wed, 08 Apr 2026 06:15:42 GMT

Settings

{
  "dataMapperVersion": 2,
  "validateFuncCoreTools": true,
  "autoRuntimeDependenciesPath": "C:\\Users\\sadanandan.varadhara\\.azurelogicapps\\dependencies",
  "autoRuntimeDependenciesValidationAndInstallation": true,
  "parameterizeConnectionsInProjectLoad": true
}

What type of Logic App Is this happening in?

Consumption (Portal)

Are you experiencing a regression?

No response

Which operating system are you using?

Windows

Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

Workflow JSON

Screenshots or Videos

No response

Environment

VS code version:1.106.3.0

Additional context

No response

[github-actions]

AI Triage Analysis

Component: VS Code Extension (Standard) | Priority: P1 | SKU: Standard (VS Code) ⚠️

Note: Reporter selected "Consumption (Portal)" but the error telemetry (azureLogicAppsStandard.startDesignTimeApi, extension v5.230.15, VS Code 1.106.3) clearly indicates this is a Standard (VS Code) issue. The design-time API is VS Code-only.

Relevant Code

• apps/vs-code-designer/src/app/utils/codeless/startDesignTimeApi.ts:51-153 — Core startDesignTimeApi() function; the error is thrown within this callWithTelemetryAndErrorHandling block
• apps/vs-code-designer/src/app/utils/codeless/startDesignTimeApi.ts:140-151 — Catch block: error instanceof Error ? error.message : error — if error is undefined, this yields "Unknown Error"
• apps/vs-code-designer/src/app/commands/funcCoreTools/validateFuncCoreToolsIsLatest.ts — Called before design-time start when validateFuncCoreTools: true; could affect func binary availability
• apps/vs-code-designer/src/app/utils/binaries.ts — Binary resolution for func core tools on Windows

Probable Root Cause

The "Unknown Error" with error type: undefined indicates an exception was thrown that isn't an Error instance (e.g., a rejected Promise with no value, or an OS-level spawn failure). The user has autoRuntimeDependenciesValidationAndInstallation: true pointing to a custom path (C:\Users\..\.azurelogicapps\dependencies), so the func binary may be missing, corrupted, or inaccessible. On Windows, cp.spawn() in startDesignTimeProcess() can silently fail if the func executable is not found on PATH or at the expected binary path.

Suggested Investigation

1. Check if the func core tools binary exists at autoRuntimeDependenciesPath (C:\Users\sadanandan.varadhara\.azurelogicapps\dependencies); try reinstalling via "Azure Logic Apps: Install or Update Azure Logic Apps (Standard) Dependencies"
2. Look at the VS Code Output panel (Azure Logic Apps channel) for the raw error — the catch block shows a "View output" button that surfaces the actual spawned process error
3. Verify getFunctionsCommand() returns a valid path on this Windows machine — may need to check funcCoreToolsBinaryPathSettingKey resolution in binaries.ts

Similar Issues

• Search for other recent P1 azureLogicAppsStandard.startDesignTimeApi issues — there appear to be similar reports with Windows + custom dependency paths

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Automated analysis by issue triage agent. May contain inaccuracies — verify before acting.
Calibration: reviewed ~10 past triages, 0 explicit corrections found.

Generated by Issue Triage Agent for Azure Logic Apps UX for issue #9030 · ◷