hi Yuvraj,
Thanks for trying to help on my request, i have done some modification in your formula, so it matched 100%, the scenario like First name or Last Name object itself may have values like "Error or #", or both, then we should re-write the formula as
this may be useful for someone...
[FName]:
= If ( Match([FirstName];"*Error*")=1 or Match([FirstName];"*#*")=1) Then " " Else [FirstName]
[LName]:
=If ( Match([LastName] ;"*#*")=1 or Match([LastName] ;"*Error*")=1 ) Then " " Else [LastName]
[FullName]:= [FName] + [LName]
Regards,
Balaji