array formula behavior changed?!

[Little_Ghost]

Hi guys!
I have a weird little problem with an array formula.
I've been using this for a couple of years now and it always worked perfect but I just noticed something strange.

This is the formula:

=IF(ISNA(INDEX(DB_Data!$A$2:$F$3550;(MATCH($A9&$C9&$D9;DB_Data!$A$2:$A$3550&DB_Data!$C$2:$C$3550&DB_Data!$D$2:$D$3550;0));5));"Not found in database";INDEX(DB_Data!$A$2:$F$3550;(MATCH($A9&$C9&$D9;DB_Data!$A$2:$A$3550&DB_Data!$C$2:$C$3550&DB_Data!$D$2:$D$3550;0));5))

What it does is look up the values from col. A, C and D in a different (data) worksheet and match them with the data on the formula's row. When found it then return the corresponding value for column E for the data worksheet and put that in column F (where the forumla is).

Now, when col. A, C and D are blank, it always used to put "not found in database" in column F. This was fine but I had to extend te range of where the fomula was looking and when I now copy the formula down, it will read "0" instead of "not found in database".
Whenever I fill anything in in one of the columns'cells it is checking, it will return "not found in database" (when it's not on the other worksheet ofcourse).

Does anybody have an idea why it is now doing this?

Kind Regards,

- Little_Ghost

 

[Aladin Akyurek]

I was already experimenting with that setup

Great. Thanks for providing feedback.