Using Slice expression giving errors for a Look up column field in SharePoint

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Posted on by varsh

I am using this formula expression (slice(items('Apply_to_each')?['name'], 0, 6)) to set a look up column in SharePoint. However it gives me below error which I understand as look up column may need Integer data type. Can someone pls help me to resolve this error
 
The 'inputs.parameters' of workflow operation 'Update_file_properties' of type 'OpenApiConnection' is not valid. Error details: Input parameter 'item/Site/Id' is required to be of type 'Integer/int64'. The runtime value '"HAMPPA"' to be converted doesn't have the expected format 'Integer/int64'.

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Nived_Nambiar 18,138 Super User 2026 Season 1 on at

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Hi,

From the error - i could see that output of slice expression is a string "HAMPPA" rather than a integer value. Could you please check the value items('Apply_to_each')?['name'] - like what value you need to extract from it ?

Thanks & Regards,
Nived N

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David_MA 15,101 Super User 2026 Season 1 on at

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You will need to show the configuration of the action Update file properties in your workflow, which is where the error is occurring according to the error message. Based on the error, it doesn't seem related to your expression.

However, the issue might be as simple as using this expression, so it returns an integer instead of a string once you resolve the issue identified by @Nived_Nambiar that you are returning text with your expression ("HAMPPA"): int(slice(items('Apply_to_each')?['name'], 0, 6))

Without seeing your flow, I don't know where you have used the expression.

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