SQL ERROR

Error 6550 calling procedure:

ORA-06550: linje 3, kolonne 3:
PLS-00201: identifikatoren STRATIGRAFI.STRATWEB m? deklareres
ORA-06550: linje 3, kolonne 3:
PL/SQL: Statement ignored

The last SQL statement executed was:

begin
  HTP.HTBUF_LEN := 63;
  stratigrafi.stratweb.Visdok(c_dokid=>:B1);
  commit;
end;