Carl wrote:VA/NV is a Xy4 command; it won't work in Xy3. Ditto VA $M+6. Your SORT command is bumping up against a built-in limitation of Xy3. I don't think it will DeFine a block greater than 64K, much less sort it. Times like these a copy of Xy4 comes in handy.And my successful sorting of over 8000 lines was indeed with Xy4. Harry Binswanger hb@xxxxxxxx