Calling 'StartWorkflowOnListItem' web service fails with 'Cannot find list' error

Issue

When invoking 'StartWorkflowOnListItem' Nintex workflow web service, you may get the error 'Cannot find list' even though the list exist and the user has permissions on the list/site

Error Code

Exception calling "StartWorkflowOnListItem" with "4" argument(s): "Server was unable to process request. ---> Cannot find list. Parameter name: listName Actual value was 'list abc'."

Resolution

Include '?WSDL' at the end of the Webservice url like: "/_vti_bin/nintexworkflow/workflow.asmx?WSDL"

Example:

$url = $webUrl + "/_vti_bin/nintexworkflow/workflow.asmx?WSDL"
$ws = New-WebServiceProxy -Uri $url -UseDefaultCredential 

Additional Information

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