Hi @jrichards ,

We can do below two options.

1. Provide a validation, when Qty is Zero
2. Provide default Qty is One

OPTION 1

It requires a small piece of customization. Please find the code for reference.

 public class SOOrderEntryEXT : PXGraphExtension<SOOrderEntry>
    {
        protected virtual void SOLine_RowPersisting(PXCache sender, PXRowPersistingEventArgs e)
        {
            SOLine row = (SOLine)e.Row;
            if (row != null)
            {
                if (row.OrderQty == decimal.Zero)
                {
                    sender.RaiseExceptionHandling<SOLine.orderQty>(row, row.OrderQty, new PXSetPropertyException("Quantity must be greater than 0", PXErrorLevel.Error));
                }
            }
        }
    }

OPTION 2

• In OrderQty FieldDefaulting event, you can set the Default Qty as one. Please find the source code below.

    protected virtual void SOLine_OrderQty_FieldDefaulting(PXCache sender, PXFieldDefaultingEventArgs e, PXFieldDefaulting baseEvent)
        {
            baseEvent?.Invoke(sender, e);
            SOLine row = e.Row as SOLine;
            if (row == null) return;

            if (row.OrderQty == decimal.Zero)
            {
                e.NewValue = row.OrderQty = 1;
            }
        }

Hope this helps!!