listMarketBook started giving error

[hobbyuser]

Hello -

I have a bot that has been running for a few months. Since yesterday, I started getting the below error from calls to listMarketBook. The error message means that a mandatory field is missing. But, as per the docs, the only mandatory field is marketIds. What do I need to change in my call please?


SportsAPING/v1.0/listMarketBook
Params: {'marketIds': [['1.177032265', '1.177031997', '1.177032399', '1.177362453', '1.177242591']], 'priceProjection': {'priceData': ['EX_BEST_OFFERS'], 'exBestOffersOverrides': {}, 'virtualise': True, 'rolloverStakes': False}}
Exception: None
Error: {'code': -32602, 'message': 'DSC-0018'}
Full Response: {'jsonrpc': '2.0', 'error': {'code': -32602, 'message': 'DSC-0018'}, 'id': 1}

[jabe]

You seem to have doubled-up on the square brackets for the marketIds array, Is that a requirement of the language your code is in?

[hobbyuser]

Apologies for not clarifying this. Code is in Python. I am using the betfairlightweight package. Yes double square brackets is required. This code has been running fine for about 3 months now. I have not changed anything on the code. But this error started popping up since yesterday.

[jabe]

Apologies for not clarifying this. Code is in Python. I am using the betfairlightweight package. Yes double square brackets is required. This code has been running fine for about 3 months now. I have not changed anything on the code. But this error started popping up since yesterday.

I was wondering whether perhaps they'd made some parameter checking a little more strict lately. I haven't got round to investigating Python yet, so didn't recognise it.

I can't see anything wrong with it. I might have omitted 'exBestOffersOverrides': {} since it has no values specified, but I wouldn't have expected that to be the cause of the error.

[jabe]

Should the square brackets on this bit:
'priceData': ['EX_BEST_OFFERS'],
have been doubled too?

[hobbyuser]

How can I contact Betfair API team on this? Appreciate any help.

[hobbyuser]

Should the square brackets on this bit:
'priceData': ['EX_BEST_OFFERS'],
have been doubled too?

Thank you for the suggestion. I just tried this but got the exact same error.

[jabe]

How can I contact Betfair API team on this? Appreciate any help.

It's bdp@betfair.com

[hobbyuser]

Thank you. Email sent. Fingers crossed.

[LiamP]

Double brackets is not valid

[Julien06]

hobbyuser
Did you get an answer from Betfair API team? I have also the same issue with Betfairlightweight since today. It was working great before and since many years.

Edit: LiamP was right. I tried and it works again. Thanks.
The stranger thing is I'm sure to use this endpoint with my bot with double brackets since many years and all was working great...