'Adding Parameter to DateDiff Function

Not sure I am going at this the best way, I would like to make the last parameter of the DateDiff formula something the user enters. I get the parameter popup, but when I enter the desired date in the popup I get an error (screen shot of error is below):

Interest Days: DateDiff("d",Nz([Loan]![SetupDate],DateAdd("m",-1,[Loan]![CreationDate])),Format([Enter the date you wish to pull from],"mm/dd/yyyy")+1)

I have tried putting a # in the parameter popup and I also tried not putting the parameter in a Format, like this but it results in the same error:

Interest Days: DateDiff("d",Nz([Loan]![SetupDate],DateAdd("m",-1,[Loan]![CreationDate])),[Enter the date you wish to pull from]+1)

Error Message



Solution 1:[1]

First, specify the Parameter as DateTime:

[Enter the date you wish to pull from]

Next, use it as a date:

Interest Days: DateDiff("d",Nz([Loan]![SetupDate],DateAdd("m",-1,[Loan]![CreationDate])),[Enter the date you wish to pull from])+1

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Gustav