ISBLANK tests for an EMPTY cell; a formula which returns a null string
doesn't constitute an empty cell. Perhaps ISNUMBER would suit your needs in
the function below?
--Bruce

"Rao Ratan Singh" wrote:

Sir,
=IF(ISBLANK(E24),"",(DATE(YEAR(E24),MONTH(E24)+3-MOD(MONTH(E24)-1,3),1)))
It is returning #value! Due to in e24 which have a conditional formula which
is sometimes returns blank. I want that it should be returned blank only when
e24 is blank.

How it can be.

Rao Ratan Singh