I have a function, with few variables including a date variable.

I have a script in the function for cases the date variable is null.

On some cases when I use the function - I have no date variable - meaning it's null.

When I write

Date01=null;

thisapp.function(var01,var02,Date01);

I get an error:

Mismatch data type for function 'CreateSolveDeleteFnA' at argument index 15 expected data type TIMESTAMP found data type NULLTYPE

How can I enter a null variable ?

Ravid