ZyLAB.Platform.WinService.exe will not start because of validation error on the workflow.xml

SYMPTOMS

2015-09-16 13:51:08,738 MACHINENAME [6] ERROR - Failed to start workflow manager:ZyLAB.Platform.Services.CAS.ContentAccessException: The element 'zylab' has invalid child element 'workflow'. List of possible elements expected: 'workflows'.
   at ZyLAB.Platform.Services.CAS.WorkflowManager.<ValidateWorkflowConfiguration>b__16(Object sender, ValidationEventArgs eventArgs)
   at System.Xml.Schema.XmlSchemaValidator.ValidateElementContext(XmlQualifiedName elementName, Boolean& invalidElementInContext)
   at System.Xml.Schema.XmlSchemaValidator.ValidateElement(String localName, String namespaceUri, XmlSchemaInfo schemaInfo, String xsiType, String xsiNil, String xsiSchemaLocation, String xsiNoNamespaceSchemaLocation)
   at System.Xml.Schema.XNodeValidator.ValidateElement(XElement e)
   at System.Xml.Schema.XNodeValidator.ValidateNodes(XElement e)
   at System.Xml.Schema.XNodeValidator.ValidateElement(XElement e)
   at System.Xml.Schema.XNodeValidator.Validate(XObject source, XmlSchemaObject partialValidationType, Boolean addSchemaInfo)
   at ZyLAB.Platform.Services.CAS.WorkflowManager.ValidateWorkflowConfiguration(XDocument xmlDocument)
   at ZyLAB.Platform.Services.CAS.WorkflowManager.LoadConfiguration(String configfile)
   at ZyLAB.Platform.Services.CAS.Runtime.InitializeInternal()

CAUSE

This may occur when you have modified the workflow.xml in Release 6.4 Service Pack 1 and attempt to upgrade using the modified workflow xml file.

RESOLUTION

This is a known issue which can be circumvented by replacing the modified workflow.xml with the default workflow.xml from a fresh installation.

APPLIES TO

3.8