Getting error: "Asynchronous Query library internal error...."

Question

As per client, they're running a code that worked before but suddenly they're getting this error. Another thing, it seems error is intermittent. Sometimes it works sometimes it won't.

They're using the following:

df = ld.get_data(

universe=instrumento,

fields=requested_fields,

parameters=params,

)

fields:[

"TR.PortfolioConstituentName",

"TR.PortfolioWeight",

]

params = {"SDate": date, "Curn": "USD", "CH": "Fd", "RH": "IN"}

I am just downloading Constituents Name and PortfolioWeight for a given portfolio, for example IVV ETF, using LIST(35557137) as universe

Sample date is yesterday.

I tried downloading it on excel add in with sample formula =@RDP.Data("PORTFOLIO(35557137)","TR.PortfolioConstituentName;TR.PortfolioWeight","SDate=2026-08-30 CH=Fd RH=IN") and it did work with no error message.

Jirapongse · Answer

@Erin

Thank you for reaching out to us.

I searched the forum for this error and found several related discussions, such as Lseg-data.get_data slow after 3pm UTC.

If the issue occurs intermittently, it is typically caused by a backend service issue rather than the client code or the LSEG Data Library itself.

To help identify the root cause, please enable debug logging in the LSEG Data Library. Refer to this article for instructions on enabling debug logs. Once the issue occurs again, please share the log file so we can determine whether the problem originates in the library or the backend service.

raksina.samasiri · Answer

Hi @Erin ,

The error seems to be from the backend service, not the data library itself

This is the same error posted in ek.get_data Asynchronous Query library internal error. - LSEG Developer Community, (you can check case number 10824336)

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