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When calling the standard API, it says' the sequence does not contain any matching elements'

ShawnChenJun
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Hello SAP,

I need to create a sales order by calling an interface from an external system, When calling the standard API 'API_SALES_ORDER_SRV', it says' the sequence does not contain any matching elements', any behavior that calls this API will result in the same error. But after about 30 minutes, when using the same data call, there will be no more errors.

In addition, for a long time before, the problem occurred between 4:30 pm and 5:00 pm every day, but now the problem occurs between 9:30 am and 10:00 am.
I am eager to know how to solve or troubleshoot the problem. Please respond to any helpful ideas or methods. Thank you very much!

Thanks and Regards!

 

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