Look up filed delegation issue SharePoint-PowerApp

[Naligurtan]

Hello All,

I have two SharePoint lists.

1-Contract List

ID	Contract Name	Customer Name(Look Up from Customers List below)
1
2

2-Cusomers List

ID	Customer Name
1	Dell
2	HP
3	IBM
4	Microsoft
	over 200.000 customers

There are over 20.0000 customers in the Customer List.

I want to create a Power App form for the Contract List. I am extracting customer name data from the Customer List as look up.

It gives me an error and do not let me to create the PowerApps form for the contract list.

I guess there is a way around to manipulate it with delegation. But I do not know how to do it.

I would appreciate if someone could help me out on this issue.

Thanks

[#2]

@Naligurtan what is the error because there isn’t a reason you can’t do that because of a lookup column I use them all the time. 

[#3]

@ChrisWebbTech Please see the screenshot of the error. 

[#4]

That doesnt tell me much. This doesnt even look like an error in powerapps. Usually this stems from sorting or filtering on a column that is not indexed in the Sharepoint list with the large number of items.