Hi Naomi.

I used your tip about using a derived table to get my query working:

Hi Naomi.

Thanks for the tip on using a derived table - I never even thought about it. I finally got this query working:

TEXT TO lcSQL TEXTMERGE NOSHOW PRETEXT 15
	SELECT * FROM 
		(SELECT DTOT(VEH.EvtDate) + ((VAL(GETWORDNUM(VEH.EvtTime, 1, ":")) * 3600) + (VAL(GETWORDNUM(VEH.EvtTime, 2, ":")) * 60)) AS start_time, 
				DTOT(VEH.EvtDate) + ((VAL(GETWORDNUM(VEH.EvtTime, 1, ":")) * 3600) + (VAL(GETWORDNUM(VEH.EvtTime, 2, ":")) * 60) + (VAL(GETWORDNUM(VEH.duration, 1, ':')) * 3600) + (VAL(GETWORDNUM(VEH.duration, 2, ':')) * 60)) AS end_time, 
				ST.descr AS SvcType_dsc, SVC.servref 
		FROM funeral!ServiceVehicle VEH WITH (BUFFERING = .T.) 
			JOIN aserdet SVC WITH (BUFFERING = .T.) ON VEH.service_id = SVC.serviceid 
			JOIN psvctype ST ON SVC.servtype = ST.code 
		WHERE VEH.VehCode =  '[[tcVehCode]]' AND VEH.SvcVehID # [[tiSvcVehID]] ) DT 
	WHERE DT.start_time <= {[[ttEndTime]]} AND DT.end_time >= {[[ttStartTime]]}
ENDTEXT 

Thanks.