in an RData request for multiple RICs, is there a way to pass parameters per single RIC?
I want to request Close prices for a number of RICs on a certain SDate which is different for every RIC. Can this be done in a single request?
No, this cannot be done in a single request. Parameters can be specified per field. In this case they're applied to that field, e.g. "TR.PriceClose(SDate=20200101 EDate=20201231)". Or they can be specified per request. In this case they're applied to all fields in the request. There's no way to specify parameters per instrument.