I have found the same error. I understand that the server will internally expand instruments to RICs before extracting data. The "expanded to 0 RICS" error should imply that the RIC is not available for the query range. If I modify the query range to Dec 27, data can be extracted properly.

The following result from Historical Search indicates that the RICs were available only on MarketByPrice domain ( domainCode: 8 ) on Dec 26, while the intraday report normally is on the MarketPrice domain.

For this issue, please kindly contact TRTH V2 support team via Contact Us for further investigation. In the product field, please select "Thomson Reuters Tick History v2".

Historical Search result for 'FB10mvH8' RIC:

Request:
POST https://hosted.datascopeapi.reuters.com/RestApi/v1/
{
"Request": {
"Identifier": "FB10mvH8",
"IdentifierType": "Ric",
"Range": {
"Start": "2017-12-26T00:00:00.000Z",
"End": "2017-12-26T23:59:59.999Z"
}
}
}

Response:
{
"@odata.context": "https://hosted.datascopeapi.reuters.com/RestApi/v1/$metadata#Collection(ThomsonReuters.Dss.Api.Search.HistoricalSearchResult)",
"value": [
{
"Identifier": "FB10mvH8",
"IdentifierType": "Ric",
"Source": "",
"Key": "VjF8MHgzMDAwMDAwMDAwMDAwMDAwfDB4MzAwMDAwMDAwMDAwMDAwMHx8fHx8fHxGQjEwbXZIOHw",
"Description": "Historical Instrument",
"InstrumentType": "Unknown",
"Status": "Valid",
"DomainCode": "8",
"FirstDate": "2017-06-09T00:00:00.000Z",
"LastDate": "2017-12-28T00:00:00.000Z",
"History": []
}
]
}