dss datascope-select dss-rest-api rest-api rics tick-history-rest-api pricing api historical python extraction forex c# java data authentication .net chain-ric time-series corporate-actions error bonds isin search json dss-gui FTP http symbology dss-soap-api entity soap-api api-limits terms-and-conditions funds credit-ratings on-demand-extraction sftp index embargo time-out report-template connection fields futures derivatives quote equities token migration status certificate sdk eikon postman permid-api template log-in response datastream-api json-payload excel market-depth exchanges elektron-sdk error-429 expired-contract rfa error-400 permissioning volume bulk-download request error-500 lipper corporate-events sedol venue-by-day expiration date ssl eikon-data-api time-zone eonia asynchronous commodities legacy dss rest api etf qualifier delayed-feed rest_api condition-codes performance exchange-codes time-stamp proxy azure price-history usage support orhpaned-instrument web-services trbc spread linux licensing pending-job web timeseries static-data direct-feed metadata nuget filter gui example csv yield delphi error-handling netes pricing-history rdp-api events python api sql jar vba repo connection-error pe-code url time ric maturity calendar fix-protocol issue error-404 visual-studio environment error-message exception request-token multi-threading model-view-controller rdms treasury refinitiv-realtime stream reports tls upgrading settlement api-token deserialize forwards mnemonics synchronous error-502 credentials world-check error-408 configuration matlab polling page euribor node-js oauth documentation tick-data rest api splunk exchange-holidays hardware trth-rest-api trade starmine handshake