#NUM! error

[Rubber Beaked Woodpecker]

On certain cells the following formula returns a #NUM! error.

=INDEX(12:12,AGGREGATE(14,6,COLUMN(12:12)/(12:12<>0),($C$10)-COLUMNS($H13:H13)))

I was hoping that this error could be removed by using IFERROR but with no joy.

Any advice please?

 

[gravanoc]

I tried using IFERROR on it and it masked the #NUM. What context is it not working in?

 

[Fluff]

I was hoping that this error could be removed by using IFERROR but with no joy.

What did you try?