Append Automem

Hi,
I'm trying to use "append automem"

select fatturaiva

m.numero = psNumero
m.uid = psUID
append automem

but I get this error:

Code:

Error: reported from lib_object.c:7976 in runtime mode username: Fabio current app: linakeinvoiceb2b (loaded) on error: error number: 292 error message: Property/Variable 'M' not found command: M->CODICEIVA database: C:\Lianja\cloudserver\tenants\public\data\linakeinvoiceb2b\ (shared) Stacktrace: Called from procedure - tagtobeextract at line 357 Called from procedure - readxml at line 146 Called from procedure - importfatture_click at line 37

I need to declare all the m var?

this is the table:
Structure for table : fatturaiva.dbf
Alias : fatturaiva
Number of records : 309
Rowcount : 309
Deleted count : Yes
Deleted list : Yes
Deleted records : 0
Date of creation : 18/12/2018 14:36:22
Date of last update : 06/02/2019 08:37:08
DES3 Encrypted : No
CursorAdaptor : No
Metadata :
Field Field Name Type Width Dec Description
1 CODICEIVA Character 10 Codice IVA
2 DESIVA Character 50 Descriz. IVA
3 IMPONIBILE Numeric 15 6 Imponibile
4 IVA Numeric 15 6 IVA
5 UID Character 50 UID
6 NUMERO Integer 10 Numero
7 NATURA Character 5 Natura
8 ALIQUOTA Numeric 6 2 Aliquota

thanks
Fabio