N = GET_NUMBER_OF("ORDERS")
for i from 1 to N
  ORDER = GET_ITEM("ORDERS", i)
  _CLASSCODE = GET_VALUE(ORDER, "CLASSCODE")
  _TICKER = GET_VALUE(ORDER, "SECCODE")
  _KEY = GET_VALUE(ORDER, "NUMBER")
  _TIME = GET_VALUE(ORDER, "TIME")
  _TRANS_ID = GET_VALUE(ORDER, "TRANS_ID")
  _PRICE = GET_VALUE(ORDER, "PRICE")
  _DATE = GET_VALUE(ORDER, "DATE")
  _SESSION_DATE = GET_VALUE(ORDER, "SESSION_DATE")
  WRITELN ("C:\Market\TEST.txt","i;"&i&";_TRANS_ID;"&_TRANS_ID&";_PRICE;"&_PRICE&";_DATE;"&_DATE&";_SESSION_DATE;"&_SESSION_DATE&";_TIME;"&_TIME&";_KEY;"&_KEY&";_TICKER="&_TICKER&";_CLASSCODE="&_CLASSCODE)
end for

PORTFOLIO_EX TEST;
DESCRIPTION TEST;
CLIENTS_LIST ALL_CLIENTS;
FIRMS_LIST FIRM_ID;
USE_CASE_SENSITIVE_CONSTANTS;

PROGRAM

NEW_GLOBAL("count",0)
NEW_GLOBAL("CLAS","CETS")
NEW_GLOBAL("List","USD000000TOD,EURUSD000TOD,EUR_RUB__TOD")
NEW_GLOBAL("com",0.000445)

i=1
dif=0
e=1-3*com
f=create_map()
z=create_map()
FOR SEC IN List
  s=get_param_ex(CLAS,SEC,"SHORTNAME")
  n=get_value(s,"PARAM_IMAGE")
  s=get_param_ex(CLAS,SEC,"LAST")
  p=get_value(s,"PARAM_IMAGE")+0
  s=get_param_ex(CLAS,SEC,"OFFER")
  po=get_value(s,"PARAM_IMAGE")+0
  s=get_param_ex(CLAS,SEC,"BID")
  pb=get_value(s,"PARAM_IMAGE")+0
  s=get_param_ex(CLAS,SEC,"LOTSIZE")
  q=get_value(s,"PARAM_IMAGE")+0
  z=set_value(z,"Name",n)
  z=set_value(z,"last",p)
  z=set_value(z,"bid",pb)
  z=set_value(z,"offer",po)
  z=set_value(z,"lotsize",q)
  IF count=0
   add_item(i,z)
  ELSE
   MODIFY_ITEM(i,z)
  END IF
  IF i==3
    IF pb>0
      dif=e/pb-1
      f=set_value(f,"lotsize",dif)
   END IF
  ELSE
    e=e*po
  END IF
  i=i+1
END FOR

IF count=0
  add_item(4,f)
ELSE
   MODIFY_ITEM(4,f)
END IF
 count=1
END_PROGRAM

PARAMETER Name;
PARAMETER_TITLE Name;
PARAMETER_DESCRIPTION here is Name;
PARAMETER_TYPE STRING(15);
END

PARAMETER last;
PARAMETER_TITLE last;
PARAMETER_DESCRIPTION good;
PARAMETER_TYPE STRING(10);
END

PARAMETER bid;
PARAMETER_TITLE bid;
PARAMETER_DESCRIPTION good;
PARAMETER_TYPE STRING(10);
END

PARAMETER offer;
PARAMETER_TITLE offer;
PARAMETER_DESCRIPTION good;
PARAMETER_TYPE STRING(10);
END

PARAMETER LOTSIZE;
PARAMETER_TITLE lotsize;
PARAMETER_DESCRIPTION good;
PARAMETER_TYPE STRING(10);
END

END_PORTFOLIO_EX

Здравствуйте, подскажите пожалуйста, прописываю вот такой код:
firmid = «XXXXXXXXX»;
client_code = XXXX;
limit_kind = 2;
cena = getPortfolioInfoEx (firmid,client_code,limit_kind, portfolio_value)
message (""..cena)

Но выдает ошибку:
attempt to concatenate a nil value (global 'cena')
Подскажите в чем проблема