datastream-api dsws-api python data api datastream eikon-data-api r eikon error python api time-series dsws .net python dsws token forex derivatives mnemonics historical connection index equities datastream-for-office rics datastream api date vba excel r-studio authentication dsws api eikon-com-api data-type c# trade datastream dsws datastream datatypes pricing api-limits request esg constituents isin worldscope eviews log-in screener fields symbology volatility options data static-data matlab economic-data timeseries credentials rest-api proxy eikonapi financial-statements corporate-actions dsws.api json issue datastream in r datastreamdsws2r vbscript indices dates datasteam web scraping exchanges yield curve sectors pythonapi forwards cash flow connection-error ubuntu get_data list# dsws datastream api ip address volume stock index datascope fundamental-data statistics news datastreamapi datstream formula-builder ric setup loop dss-rest-api datatype fundamentals snapshot-pricing datastream technical documentation data limits company batch oas newzealand settlement eikon data api curve rate soap-api identifier refinitiv-realtime datastream web service refinitiv api refinitiv dsws limit eikon-for-office pe-code nzx50 api python r package side-by-side-api refinitiv data platform point-in-time historical data permid-api esg score documentation backtesting error-handling access denied eviews datastream api java Download nzx dsws2r screening delivery econometrics tick-history-rest-api 403 error rest api lipper stata funds time to maturity filter release date trbc currency datastream in python credit-ratings sql thomson-reuters connection recovery dsws usage key-error nz