oracle - Procedure calling gone bad - Statement Ignored -

i have following procedure insert users in table:

create or replace procedure elr_add_user                   (i_name          in varchar2,                    i_morada        in varchar2,                    i_birthdate     in date,                    i_country       in varchar2,                    o_id            out number,                    o_error_msg     out varchar2)  error_null           exception; begin  if i_name null or    i_morada null or    i_birthdate null or    i_country null         raise error_null; end if;     o_id := elr_seq_user_id.nextval;  if o_id null   raise error_null; end if;    insert elr_users   values (o_id, i_nome, i_morada, i_birthdate, i_country);  exception     when error_null      o_error_msg := 'null fields';    when others      o_error_msg := 'unexpected error: '|| sqlerrm;  end; / 

i think procedure , it's syntax correct. when i'm trying call with:

declare      p_name         varchar2(50);      p_morada       varchar2(50);      p_birthdate    date;      p_country      varchar2(20);      p_id           number(20);      p_error_msg    varchar2(4000); begin  elr_add_user('ed warner','cenas street',sysdate,                       'china', p_id, p_error_msg);  if p_error_msg not null   dbms_output.put_line('error: '||p_error_msg); end if;  end; / 

i following message:

is there wrong calling or procedure itself?

ora-06550 followed pls-00905 compilation error. procedure in invalid state.

recompile procedure, , use show errors complete error details.

show error procedure rms_mm.elr_add_user or show errors

for example,

sql> create or replace procedure testproc   2    3    vnum number;   4  begin   5    vnum := vanothernum;   6  end;   7  /  warning: procedure created compilation errors.  sql> execute testproc(); begin testproc(); end;  * error @ line 1: ora-06550: line 1, column 7: pls-00905: object example.testproc invalid ora-06550: line 1, column 7: pl/sql: statement ignored  sql> show error procedure testproc; errors procedure testproc:  line/col error -------- ----------------------------------------------------------------- 5/1  pl/sql: statement ignored 5/9  pls-00201: identifier 'vanothernum' must declared