Performance Degradation and Intermittent Failures: Refinitiv Data Library (Python) | Jan 15-16, 2026

Dear Support Team,

I am reporting a significant performance degradation and intermittent service failures when using the Refinitiv Data Library for Python, which began on January 15, 2026, and persists as of today, January 16.

Context

Prior to January 15, the system performed optimally. Our current workflow processes 42 financial assets (RICs) with 3 time points each (Today, Yesterday, -5 business days), totaling 126 queries per cycle.

Technical Issues Identified

1. Batch Call Failures (Error Code -1)The method rd.get_history() consistently fails when querying multiple RICs in a single batch.

Error Message: "Error code -1 | Unable to collect data for the field '[FIELD]' and some specific identifier(s)"
Highly Affected RICs: *
*Indices: .FTEMUSDGBIUSDT, .TRXFLDARP, .TRXFLDBRP, .TRXFLDMXP, .TRXFLDCLP, .TRXFLDCCP, .TRXFLDINP, .DXY
* Bonds: US10YT=RR, US2YT=RR, GB2YT=RR (intermittent)
* CDS: Full batches fail randomly.
* Currencies: EUR=, JPY=

2. Intermittent Latency Response times have become highly volatile, ranging from 0.2s to several minutes. We are experiencing hangs without triggering standard timeouts.

3. Data Inconsistency We have observed that individual queries often succeed for a specific RIC while the same RIC fails within a batch call. Furthermore, the data remains available via Eikon/Workspace Desktop, confirming the issue is isolated to the API layer.

Metrics & Impact

Success Rate: Dropped from ~100% to ~76%.
Processing Time: Increased from ~1 minute to over 4 minutes.
Data Integrity: Approximately 24% of historical values are currently unrecoverable via API.

Environment & Troubleshooting

Library: Refinitiv Data Library (Python) - Latest version.
Methods: rd.get_history(), rd.get_data().
Platform: Windows 10, Python 3.x.
Session: Active and authenticated via Eikon/Refinitiv Workspace.
Temporary Workaround: We have transitioned to one-by-one processing with 100ms delays, which is inefficient for our production requirements.

Request

Please investigate if there is a known service degradation, infrastructure issues on historical data servers, or recent changes to rate-limiting/throttling policies that might be affecting our AppKey/Session.

I look forward to your technical assessment.

Best regards,

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Accepted answers

All comments

Jirapongse

@lladamartin

Thank you for reaching out to us.

The Refinitiv Data Library for Python has been rebranded to the LSEG Data Library for Python. Please refer to this Essential Guide to the Data Libraries - Generations of Python library (EDAPI, RDP, RD, LD) article.

Regarding this issue, we can't access the endpoint or server to verify the usage. Therefore, please contact the helpdesk team via LSEG Support to verify what the problem is.

Please include the URL of this discussion in your raised question to prevent it from being redirected back to this Q&A forum.

lladamartin

Dear Jirapongse,

I hope you are having a good week.

We are reaching out because we’ve noticed a consistent behavior in the data aggregation layer. While individual queries for specific RICs (like US10YT=RR) are working perfectly, the same requests often return "Unable to collect data" when processed in a larger batch.

Since we are already coordinating with the LSEG Support team, it would be extremely helpful if you could also take a look at this specific case from your side.

Technical details from today (Jan 23):

Failed Batch Request-ID: 117f850a-f822-4a31-b674-ed2bd86006ba
Affected Fields: TR.MIDYIELD and TR.CLOSEPRICE

We have already verified our local connectivity and DNS settings, and everything is performing correctly. It seems to be a specific issue with how the platform handles multi-RIC requests for these historical fields.

Thank you in advance for your time and assistance.

Best regards

Jirapongse

@lladamartin

Please follow up with the helpdesk support team. I’m unable to access the backend service to verify the issue.

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