I'm using Google sheets for storing some simple text. In a column (F) I have all names of sheets and I'm using the following to count occurrences of a certain string "aaa" in column C in all sheets:
SUMPRODUCT(COUNTIF(INDIRECT("'"&F3:F11&"'!C3:C200"),"*aaa*"))
It returns only occurrences in the first sheet. Any idea what is wrong?