pica_match() and reject() doesn't work as documented

[jorol]

Documenation:

# Delete all the 041A subject fields
do pica_each()
    if pica_match("041A",".*")
        reject()
    end
end

This deletes the whole record not only the subject fields.

[nichtich]

This example was wrong, use pica_remove instead (introduced in version 1.11).