Isn't the EMPTY(LEN()) a bit redundant?

Just EMPTY(CHRTRAN(myValue, allowedChars, "")) should be sufficient.


No.

EMPTY() return .t. for:

The empty string,
spaces,
tabs,
carriage returns,
linefeeds,
or any combination of these.


then for allowedChars = '0123456789', spaces,tabs... are not allowed.

Fabio