When I use TRTH REST API HistoricalChainResolution to get all rics of a chain in last eight years, I cannot get rics whose name ended with 3,4,5,6,eg.CLU3,CLU4,CLU5, which must be invalid contract. But when I use the same code last a few days to get the same chain, I can get these rics identifiers.
Could you please share the chain RIC and request message? Is the RIC "0#CL:"?
Anyway, I have found different result.
With "Start": "2008-01-01T00:00:00.000Z","End": "2017-11-06T23:59:59.999Z" , it returns CLU3, CLU4, CLU5.
With "Start": "2017-11-01T00:00:00.000Z", "End": "2017-11-06T23:59:59.999Z", it doesn't return the CLU3, CLU4 and CLU5.
The CLU3, CLU4 and CLU5 are valid until 2013, 2014 and 2015 respectively.