Hi Sergey,

NULL semantic is complex , but:

On my previous example, x is Logical, not char, and str() return error, but trims() functions return char null (correct for me on not VFP strong typing variable context).

If you have reason, why:

y=4
y=NULL
? LTRIM(y),VARTYPE(y,.t.)

LTRIM() not test null data type, then LTRIM() it suffers from complementary BUG.

Also in the use of the NULL one logical coherent must exist.

Fabio