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gus
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@Tim lock id's aren't the same as rowids. buffers have a lot of internal information in them along with the record itself (which you cannot get at but which we can use in the 4GL runtime). most places in the 4GL where you can use a rowid, there is something else (e.g. rowid(customer)) involved as well as the context of the usage, so the expected thing happens. still, one can subvert the correct behaviour and get into trouble, such as when a rowid is saved away someplace without the rest of the information, then retrieved and (mis)used later.
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