When Attempting to Debug a Web Application Project, An Error is Generated: Object reference not set to an instance of an object.

Products

• Workflow Solution

Issue/Introduction

When attempting to debug a Web Application project, the following error is generated:

System.NullReferenceException: Object reference not set to an instance of an object.
   at LogicBase.Tool.UI.Debugging.DebugEngine.CheckEscalationThreadStart()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext 
executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

 

Steps to reproduce:

1. Open a new Web-Application Project with any name.
2. Open the Workflow model and add a Constant Value for the Process Name.
3. Click the Debug Icon.
4. Wait for anywhere between 30 - 90 seconds. The error will automatically appear.

 

Environment

Workflow Solution 8.5 versions prior to 8.5.4229.0

Cause

Known issue

Resolution

This issue has been resolved with new Build of Workflow 8.5.4229.0 or later resolves the issue.