>>>It is unnecessary.
>>>

>>>CREATE CURSOR byby (c c(2))
>>>INDEX on ALLTRIM(C)+ALLTRIM(C) TAG t1 && VFP build a key with LEN(KEY())=FSIZE('C')+FSIZE('C')
>>
>>Try with a blank record as your first record, and you will see the problem. All index expression must give a fixed length key!
>>
>
>Why before to say anything you don't try it?
>
>Where is the problem ? I don't look any problem here:
><pre>
>CREATE CURSOR byby (c c(2))
>INSERT INTO byby values ('')
>INDEX on ALLTRIM(C)+ALLTRIM(C) TAG t1 && VFP build a key with LEN(KEY())=FSIZE('C')+FSIZE('C')
>? SEEK('11')
>INSERT INTO byby VALUES ('12')
>INSERT INTO byby VALUES (' 2')
>? SEEK('1212')
>? SEEK('22')
>

>
>Fabio

I hope someone from Microsoft can comment on this, because their official comment has always been 'be sure to use fixed length keys for your indexes'.