Intermittent Error in Jupyter Notebook – get_history Script

Question

Hi DevPortal Team,

I hope all is well.

Our client is currently using a Jupyter Notebook and has observed that the script below sometimes runs successfully, but at other times returns an error. Could you please help review and advise on the possible cause of this intermittent behavior?

Script used:

df = ld.get_history(

universe = ['US2YT=RRPS'],

fields = ['TR.BIDYIELD'],

interval = "1d",

start = '2026-06-01',

end = '2026-06-09'

)

display(df)

Error encountered:

LDError: Unable to collect data for the field 'TR.BIDYIELD' and some specific identifier(s).

Any insights or recommendations you can share would be greatly appreciated.

Thank you in advance for your support.

Paula 😁

Christian2473 · Answer

Hi @Jirapongse @PaulaNavarroLSEG

I tried the retry logic and it does work some of the time as displayed below. I can create a wrapper in the meantime for this but ideally I would like for this issue to be resolved soon. This happens both on the desktop version and codebook for me. Thank you so much for your help!

Jirapongse · Answer

@PaulaNavarroLSEG

If the problem happens intermittently, it should be the problem in the backend service, not in the library. You may need to contact the backend service team to verify what the problem is.

For the code, the client may implement a retry logic. For example:

import time

retry_max = 5

retry_count = 1

retry = True

df = None

while(retry==True and retry_count <= retry_max):

    try:

        df = ld.get_history(

                universe = ['US2YT=RRPS'],

                fields = ['TR.BIDYIELD'],

                interval = "1d",

                start = '2026-06-01',

                end = '2026-06-09'

            )

        retry = False

    except Exception as ex:

        print("Exception:" + str(ex))

        print("Retrying...: "+str(retry_count))

        retry_count=retry_count+1

        time.sleep(1)

df

PaulaNavarroLSEG · Answer

@wasin.w V3 thank you so much will inform the client  😁

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