Aye, that works. Thanks Sergey.
Can't say I've ever fully got to grips with the Group By clause. Help is very sketchy about, say, how YOU discerned that column was necessary.

>You're missing jobheads.JobID in the GROUP BY.
>
>>
>>"SQL group clause missing or invalid" under engine 90
>>
>>Now remember this was just a "first cut" stab at the SQL and I've trried many permutations, including "group by 1, 4"
>>
>>

>>Select JobAct.OurInvID, jobheads.JobID, SUM( jobheads.Quantity) as Booked, SUM( jobact.hours) as Charged, JobHeads.LabourID ;
>>  from jobact, jobheads ;
>>  where jobheads.JobID = jobact.JobID ;
>>  AND jobAct.JobID = "RTvo" ;
>>  and not EMPTY( JobAct.OurInvID) ;
>>  group by OurInvID, LabourID ;
>>  into cursor JobsS
>>

>>
>>What exactly IS VFP 9's problem with this (remember I've only been using 9 for 2 months now)