Art Of Creation: Workflow: An unexpected error has occurred while opening the workflow. See the event log on the AOS and contact your system administrator to resolve the issue.

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Источник: http://www.artofcreation.be/2015/08/...lve-the-issue/
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When trying to view or edit a workflow, the following error can pop up:

An unexpected error has occurred while opening the workflow. See the event log on the AOS and contact your system administrator to resolve the issue.

This is a general error and it could mean a lot of things. Make sure you check the obvious things first:

• Make sure that the build number of the client maches the build number of the server
• Make sure x++ compilation has been done on the AOT
• Make sure CIL is compiled without errors
• Do a data dictionary synchronization
• Refresh the WCF configuration using the Dynamics AX 2012 Configuration utility
• Remove the AUC files and KTI files from the %localappdata% directory
• Remove usage data

Well… you know… do the usual.

In my case, none of this helped. Because this was a CLR exception, I modified the try/catch in the method that was throwing the error to show the inner exception. The method Forms\WorkflowEditorHost.run was modified so it looked like this:

<div class="codecolorer-container xpp default" style="overflow:auto;white-space:nowrap;border:1px solid #9F9F9F;width:435px;"><div class="xpp codecolorer" style="padding:5px;font:normal 12px/1.4em Monaco, Lucida Console, monospace;white-space:nowrap">public void run()
{
System.Exception interopException;

try
{
modelEditorControl.Load(workflowConfiguration, userSettings); <span style="color: #007f00;">//