Object variable or With block variable not set" error message

I have taken over a project for someone at work and am getting an "Object variable or With block variable not set" error message.

The line producing the error is "ActiveSheet.Columns(fCol2).Find(What:="= ( 0+", After:=ActiveCell, LookIn:=xlFormulas, LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, MatchCase:=False, SearchFormat:=True).Activate"

I'm not sure what this line is looking for - can someone interpret this for me?

Thanks!