RFC_ERROR_SYSTEM_FAILURE (incorrect pwd)

Hi.

I'm trying to execute a report using STARTRFC command, and I don't know why... it doesn't work.

The syntax I use is:

startrfc -3 -d PRD -u <USER> -p <PWD> -c 099 -l S -h 192.168.6.2 -s 30 -F Z_FI_EDITRAN_NORMA_43

and the result of the execution is:

RFC Call/Exception: SYSTEM_FAILURE

Group       Error group 104

Key         RFC_ERROR_SYSTEM_FAILURE

Message     Nombre o clave de acceso incorrectos (repita la entrada al sistema)

I'm completely sure that user and password is correct (when I try to log in in dialog mode with this user, the system say shows me a message with 1 wrong attempt to log in).

Do you know what could happen? I tried with another user/password and it works...

Thanks in advance,