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doing 'check' fbm scan, [345261..414818] gave 345300
Found floating substr "%n" at offset 345300 (rx_origin now 345259)..
+.
...
Found floating substr "%n" at offset 345317 (rx_origin now 345299)..
+.
doing 'other' fbm scan, [345299..345316] gave -1
Contradicts anchored substr "="; about to retry anchored at offset 3
+45318 (rx_origin now 345316)...