Cannot open lseg data session

adam.leroux

Hello,

I'm trying to migrate my scripts from refinitiv-data api so the LSEG-data api.

I'm trying to create a plateform session, using a lseg-data.config.json file.

I first read that config file, using

ld.open_session(config_name = "lseg-data.config.json")

But when trying to test my connection using a simple API call, like

ld.get_history("AAPL.O")

I get

LDError: No data to return, please check errors: ERROR: No successful response.(401, Authorization header is missing)

Here is my config file :

{
"http": {
"request-timeout": 60
},

"logs": {
"level": "debug",
"transports": {
"console": {
"enabled": false
},
"file": {
"enabled": false,
"name": "lseg-data-lib.log"
}
}
},
"sessions": {
"default": "platform.ldp",
"platform": {
"ldp": {
"app-key": "appkey",
"username": "username",
"password": "password",
"signon_control": true
},
"deployed": {
"app-key": "appkey",
"realtime-distribution-system": {
"url": "ws://ADS1:15000",
"dacs": {
"username": "username",
"application-id": id,
"position": ""
}
}
}
},
"desktop": {
"workspace": {
"app-key": "appkey"
}
}
}
}

Anyone has an idea of what i'm missing ?

Thank you.

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Accepted answers

adam.leroux

https://community.developers.refinitiv.com/discussion/comment/125983#Comment_125983

Hi,

Thanks for the tip, updating my pandas does the trick.

Thank you,

Best,

All comments

Gurpreet

Hello @adam.leroux

You have debugging enabled - please paste the complete log messages. Are you able to create and open the session successfully? You can try one of the basic examples here.

adam.leroux

https://community.developers.refinitiv.com/discussion/comment/125965#Comment_125965

Hello Gurpeet, thank you for your answer,

I have been able to open a session using :

session = ld.session.platform.Definition( app_key = appkey, grant = ld.session.platform.GrantPassword( username = username, password = pwd ), signon_control=True).get_session().

As you can see in this part of the log, the session is successfully opened :

Session created: PlatformSession

name = defaultconnection = PlatformData

Connection

stream_auto_reconnection = True

authentication_token_endpoint_url = https://api.refinitiv.com/auth/oauth2/v1/token

signon_control = True

server_mode = False

state = OpenState.Closed

session_id = 0

logger_name = sessions.platform.default.0

and after doing session.open() :

DEBUG:sessions.platform.default.0:Session.update_access_token(access_token='XXX') [2025-05-27T08:22:32.169568+00:00] - [DEBUG] - [sessions.platform.default.0] - [130721702053440] | AuthManager-Thread AuthManager: Refresh token will be requested in 299 seconds DEBUG:sessions.platform.default.0:AuthManager: Refresh token will be requested in 299 seconds [2025-05-27T08:22:32.169667+00:00] - [DEBUG] - [sessions.platform.default.0] - [130723949191168] | MainThread AuthManager: end authorize, result True DEBUG:sessions.platform.default.0:AuthManager: end authorize, result True [2025-05-27T08:22:32.179932+00:00] - [DEBUG] - [sessions.platform.default.0] - [130723949191168] | MainThread Opened session DEBUG:sessions.platform.default.0:Opened session

However when i try to test the connection using a simple call

ld.get_history("ESc1")

I get

AttributeError: No default session created yet. Please create a session first!

Any ideas ?

Thank you

adam.leroux

Maybe one more piece of information :

I re ran the simple

ld.open_session()

with my lseg-data.config.json file as before.

The session opens successfully

Opened session

DEBUG:sessions.platform.ldp.0:Opened session

However when i call

ld.get_history("ESc1")

I see the correct data in the debug print, but i get

TypeError: NDFrame.infer_objects() got an unexpected keyword argument 'copy'

Not sure if this is related to the session issue

Jirapongse

@adam.leroux

What version of the Pandas library are you using?

It requires pandas<3.0,>=2.0.

adam.leroux

https://community.developers.refinitiv.com/discussion/comment/125983#Comment_125983

Hi,

Thanks for the tip, updating my pandas does the trick.

Thank you,

Best,

wasin.w V3

Hello @adam.leroux

If you need to create a session with session = ld.session.platform.Definition code, you need to set that session to a LD default session before start call get_data get_history, etc. methods.

session = ld.session.platform.Definition(

    app_key = os.getenv("APP_KEY"), 

    grant = ld.session.platform.GrantPassword(

        username = os.getenv("USERNAME"), 

        password = os.getenv("PASSWORD")

    ),

    signon_control=True

).get_session()



ld.session.set_default(session)




session.open()


ld.get_history("EUR=")

#Got Data

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