util.scand returns null

Hi,

I am facing weird situation. There is one dynamic PDF created using LiveCysle designer 8.5 and used by many users.

I have used one of line code: var recDate = util.scand("mm/dd/yyyy', Page1.ReceivedDate.formattedValue);

This line returns NULL for one user but working fine for rest of the users. All are using the same PDF.

See the below screen print:

Page1.ReceivedDate.formattedValue is:

When I use the same PDF on my machine, I see ( here I have used different date, if I give the same date result be in the same format ):

Please advise why there are two ouputs for same line of code.