Error 'DSC-0018'/-32602

[Arvid]

Hi there,

I send requests for placing orders in-running, and occasionally, but not always.
One example is this, where I have parameters

{'marketId': '1.171174652', 'instructions': [{'selectionId': '9292000', 'side': 'lay', 'orderType': 'LIMIT', 'limitOrder': {'size': '2.67', 'price': '2.56', 'persistenceType': 'LAPSE', 'timeInForce': 'FILL_OR_KILL', 'minFillSize': '2'}}]}

and get a return of
{'jsonrpc': '2.0', 'error': {'code': -32602, 'message': 'DSC-0018'}, 'id': 1}

Any idea why this is, and why it happens only some times?

Thanks!

[jabe]

I don't know why it sometimes works and sometimes doesn't. However, the value for the side parameter should be in upper case.

[Arvid]

Thanks, I'll try that!

[WTPooh]

selectionId is Long. size, price and minFillSize are Double.
Correct request string:

{'marketId':'1.171174652','instructions':[{'selectionId':9292000,'side':'LAY','orderType':'LIMIT','limitOrder':{'size':2.67,'price':2.56,'persistenceType':'LAPSE','timeInForce':'FILL_OR_KILL','minFillSize':2}}]}

[jabe]

selectionId is Long. size, price and minFillSize are Double.
Correct request string:

{'marketId':'1.171174652','instructions':[{'selectionId':9292000,'side':'LAY','orderType':'LIMIT','limitOrder':{'size':2.67,'price':2.56,'persistenceType':'LAPSE','timeInForce':'FILL_OR_KILL','minFillSize':2}}]}

Numbers with quotes around them are accepted. A problem can arise when a market id ends in zero and is written as numeric. If the market id ends in zero, the zero is lost and then the market id doesn't match any actual market id.

DSC-0018 denotes a missing parameter.