HOWTO: [AX2009] Update PURCHQTY of a PURCHLINE

Use this script for update the purchase quantity of a purchline

ttsbegin;
_pLine.PurchQty = q;
PurchLine::modifyPurchQty(_pLine, InventDim::find(_pLine.InventDimId), avoidBox);
InventMovement::bufferSetRemainQty(_pLine);
_pLine.update();
ttscommit;