>Anyway, SCAN...ENDSCAN is different issue. Its behavior is well confirmed via our corporate experience, though not documented clearly. Still it means (from my point of view) that because it is not documented, it would be more reliable to add a “select (table_you_need)” after SCAN to avoid any confusion.

Excuse me? Here's the relevant paragraph from the SCAN ... ENDSCAN topic (VFP 7 Help):

SCAN ... ENDSCAN ensures that, upon reaching ENDSCAN, Visual FoxPro reselects the table that was current when the SCAN ... ENDSCAN loop began.

Tamar