Error Populating Date Field in SharePoint List

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Posted on 21 Feb 2025 17:44:36 by Sean_T

Hi,

I'm trying to create a flow where i output any new rows created in an excel table to sharepoint list - i keep getting an error regarding the date:
OpenApiOperationParameterTypeConversionFailed. The 'inputs.parameters' of workflow operation 'Create_item' of type 'OpenApiConnection' is not valid. Error details: Input parameter 'item/Date_x0020_of_x0020_Month' is required to be of type 'String/date'. The runtime value '"45658"' to be converted doesn't have the expected format 'String/date'.

the error is always repeating here in the create item part:

The date formats are the same in both the list and the excel file.

any help would be appreciated

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Business Process Flows

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David_MA 10,858 Super User 2025 Season 1 on 21 Feb 2025 at 19:04:11

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Error When trying to create a flow from excel to sharepoint list

SharePoint does not use the ISO8601 date format. It uses the region settings in the site. In North America you need to enter the date in this format: 'MM/dd/yyyy hh:mm tt'

If you have time turned off in the list, then just use the date portion of the format. Here is an example of the expression I use:

convertTimeZone(triggerOutputs()?['body/Modified'], 'UTC', 'Eastern Standard Time', 'MM/dd/yyyy hh:mm tt')

Although, your data is coming from Excel and I don't often create items from Excel data, it usually goes the other direction for me. So you might need to do some extra manipulation of the expression to get the date in this format. And of course, you don't need to convert the time zone either.

Based on the fact the error message says the run time value was "45658", that would appear to be an Excel serial date. If I calculated it correctly, 45658 would be January 1, 2025. If so, I believe this should work for you: addDays('1899-12-30', <your_serial_date>, ' MM/dd/yyyy')

You can read about the date format at Date format needs to be DD/MM/YYYY | Microsoft Community Hub
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Michael E. Gernaey 42,027 Super User 2025 Season 1 on 21 Feb 2025 at 18:21:32

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Error When trying to create a flow from excel to sharepoint list

Hi

Please share the actual value during the runtime of a failed flow for that field. Cannot tell anything just from that property itself.

Share that and should be able to help you. It's possible that it was being converted to the Excel format early on which would make it invalid there.

Please share the run with the input of that field and we can help

Cheers

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