The first entry in the log is too long as it contains the results for the GetList. The second command for deleting has an error it looks like though. I tried deleting through the Swagger UI and I get the same "OData path is undefined for the request " error. I am going to try deleting via the custom method and see if that works.
Request completed in 73 ms,
[{"Request":{"resource":null,"parameters":[{"name":"cache-control","value":"no-cache","type":"HttpHeader"},{"name":"authorization","value":"Basic Nzg4NjMtZXB1cmR5OlNhbXNjcmVlbjA0MTk=","type":"HttpHeader"},{"name":"Accept","value":"application/json, application/xml, text/json, text/x-json, text/javascript, text/xml","type":"HttpHeader"}],"method":"DELETE","uri":"https://ausmtspilot102.epicorsaas.com/SaaS203Pilot/api/v1/Ice.BO.UD100Svc/UD100s('78863',%20'1200%20Chieftain',%20'Bottom',%20'5x5',%20'(Feed%20Panel)',%20'90BF39CE-1300-4CB6-B1EF-0B542A431AE3')"}}
, {"Response":{"statusCode":404,"content":"{\"HttpStatus\":404,\"ReasonPhrase\":\"REST API Exception\",\"ErrorMessage\":\"OData path is undefined for the request https://ausmtspilot102.epicorsaas.com/SaaS203Pilot/api/v1/Ice.BO.UD100Svc/UD100s('78863', '1200 Chieftain', 'Bottom', '5x5', '(Feed Panel)', '90BF39CE-1300-4CB6-B1EF-0B542A431AE3')\",\"ErrorType\":\"Epicor.RESTApi.ErrorHandling.ApiException\"}","headers":[{"Name":"Content-Length","Value":"348","Type":3,"ContentType":null},{"Name":"Cache-Control","Value":"private","Type":3,"ContentType":null},{"Name":"Content-Type","Value":"application/json; charset=utf-8","Type":3,"ContentType":null},{"Name":"Date","Value":"Mon, 08 Apr 2019 12:27:00 GMT","Type":3,"ContentType":null},{"Name":"Server","Value":"Microsoft-IIS/8.5","Type":3,"ContentType":null},{"Name":"X-AspNet-Version","Value":"4.0.30319","Type":3,"ContentType":null},{"Name":"X-Powered-By","Value":"ASP.NET","Type":3,"ContentType":null}],"responseUri":"https://ausmtspilot102.epicorsaas.com/SaaS203Pilot/api/v1/Ice.BO.UD100Svc/UD100s('78863',%20'1200%20Chieftain',%20'Bottom',%20'5x5',%20'(Feed%20Panel)',%20'90BF39CE-1300-4CB6-B1EF-0B542A431AE3')","errorMessage":null}}]