Hi Borislav

Thankyou for your reply.

I have managed to get this working by the following:

DO case
	CASE !EMPTY(lcdept)
		SET FILTER TO INLIST(planrep.dept,&lcdept) additive
	CASE !EMPTY(lcseason)
		SET FILTER TO INLIST(planrep.season,&lcseason) additive 
	CASE !EMPTY(lcfactory)
		SET FILTER TO INLIST(planrep.factory,&lcfactory) additive
	CASE !EMPTY(lccountry)
		SET FILTER TO INLIST(planrep.country,&lccountry) additive
ENDCASE

Seems to work fine!!