I am just learning and I kind of program directly from the samples in the manual.

This is the command I am trying to enter,

var vCnt as int
var vloop as int
var vMytotal as Double

vmytotal = 0
vcnt = @formResultSetTotal("lot details")
vloop=1
while vloop <= vcnt

{
vmytotal =(vmytotal + @tonumber(@formfieldvalue("lot details", "qty",vloop))

vloop = vloop + 1

}

Lot Balance = vMyTotal

It tells me there is an error at the point of:

vloop = vloop + 1

with a notation of "indentifier" referring to vloop

Thanks!  I must have looked at it for 10 minutes....