Thanx the apostrophe's helped. I now have a working formula. becouse i have so many tabs can i make this formula smaller?
=IFERROR(VLOOKUP(A3,'CFF & CAS FFEX'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'SW&M FFEX'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'FEX I'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'FFEX I'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'Patrolling FEX'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'CSW FFEX'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'FEX II'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'FFEX II'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'Eng FFEX'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,'FEX III'!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,FFEXIII!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,CONVOY!A3:E14,5,FALSE),0)+IFERROR(VLOOKUP(A3,MOUT!A3:E12,5,FALSE),0)+IFERROR(VLOOKUP(A3,WAR!A3:E14,5,FALSE),0)
I was thinking possibly something like: IFERROR(VLOOKUP(A3,INDIRECT("'"&INDEX($G$2:$G$5,MATCH(TRUE,COUNTIF(INDIRECT("'"&$G$2:$G$5&"'!A2:e20"),A3)>0,0))&"'!A2:e20"),5,0),0)
but its not working