CLEAR
Create CURSOR UPTest (Number I NOT null) && <== ALSO WITH I !!!
Index On Number Tag Number
Insert Into UPTest (Number) VALUES (1)
Insert Into UPTest (Number) VALUES (2)
Insert Into UPTest (Number) VALUES (3)
Insert Into UPTest (Number) VALUES (0)
Insert Into UPTest (Number) VALUES (7)

* this is a BUG on any search into a numeric index
* SEEK(),SEEK , INDEXSEEK(), KEYMATCH() also,
* all do a VAL() before start the search !!!
* A crazy for me

? Seek("Mary")     && .T. BECAUSE VAL("Mary") is 0
? Seek("1Mary")    && .T. BECAUSE VAL("Mary") is 1
? Seek("9Mary")    && .F. <=== because 9 is not present
 
? LOOKUP(Number,"Mary",Number),EOF()	&& this not use index

? Seek(.NULL.)		&& ERROR !!! bug 2 search a NULL into a index must return NULL or .F.

? Seek(DATE())		&& ERROR , OK

? Seek(.T.)    		&& ERROR , OK

? Seek($0)    		&& ERROR , !!! not conversion

USE