Query Analyzer - Return Code = -4 ?

[dakone]

When I run this stored proc in QA no errors fire. But when the job completes, I get:
"Stored Procedure: TWO.dbo.aSph_IMSworkUIClient
Return Code = -4
Query batch completed with errors."
Can anyone tell me what this means? How do I fix it so it completes without errors?

BEGIN

--Declare cursor
DECLARE WorkCursor CURSOR SCROLL DYNAMIC FOR 
    SELECT ISNULL(NO_CLIENT, '0'), ISNULL(NOM_CLIENT,''), ISNULL(ADRESSE,''), ISNULL(VILLE,''), ISNULL(PROVINCE,''), ISNULL(PAYS,''), ISNULL(CODE_POSTAL,''),
                   ISNULL(TEL,''), ISNULL(FAX,''), ISNULL(CREATION,''), ISNULL(CONTACT,''), ISNULL(TEL_CONTACT,'')
    FROM aSph_IMSworkClient
    OPEN WorkCursor

--Fill cursor with new recordset
FETCH NEXT FROM WorkCursor
    INTO @CUSTNMBR, @CUSTNAME, @ADDRESS1, @CITY, @STATE, @COUNTRY, @ZIP, @PHONE1, @FAX, @FRSTINDT, @CNTCPRSN, @PHONE2

--While recordset exists
WHILE @@Fetch_status = 0
    BEGIN
    SET @recordexists = ''
    -- Find out if the current customer number exists in the dynamics table.
    SELECT @recordexists = CUSTNMBR
    FROM RM00101  
    WHERE CUSTNMBR = @CUSTNMBR
   
    IF @recordexists <> ''
        BEGIN

            --Where customer numbers match, update the current values in the row of the dynamics table RM00101
            UPDATE RM00101
            SET CUSTNMBR=@CUSTNMBR, CUSTNAME=@CUSTNAME, ADRSCODE=@ADRSCODE, ADDRESS1=@ADDRESS1, CITY=@CITY, STATE=@STATE,
                    COUNTRY=@COUNTRY, ZIP=@ZIP, PHONE1=@PHONE1, FAX=@FAX, FRSTINDT=@FRSTINDT, CNTCPRSN=@CNTCPRSN, PHONE2=@PHONE2      
            WHERE CUSTNMBR = @CUSTNMBR  

        END


    ELSE

        BEGIN

            --Add a new row if customer number doesn't already exist insert new values in the dynamics table RM00101
            INSERT INTO RM00101 (CUSTNMBR, CUSTNAME, ADRSCODE, ADDRESS1, CITY, STATE, COUNTRY, ZIP, PHONE1, FAX, FRSTINDT, CNTCPRSN, PHONE2)
            VALUES (@CUSTNMBR, @CUSTNAME, @ADRSCODE, @ADDRESS1, @CITY, @STATE, @COUNTRY, @ZIP, @PHONE1, @FAX, @FRSTINDT, @CNTCPRSN, 
                            @PHONE2)
            SET @ErrorReturn = @@ERROR
        
        END

        SET @recordexists2 = ''
        -- Find out if the current customer number exists in the dynamics table.
        SELECT @recordexists2 = CUSTNMBR
        FROM RM00102  
        WHERE CUSTNMBR = @CUSTNMBR
            AND ADRSCODE = 'PRINCIPALE' OR ADRSCODE = '' OR ADRSCODE IS NULL 
          
        IF @recordexists2 <> ''
            BEGIN

                --Where customer numbers match, update the current values in the row of the dynamics table RM00102
                UPDATE RM00102
                SET CUSTNMBR=@CUSTNMBR, ADRSCODE=@ADRSCODE, ADDRESS1=@ADDRESS1, CITY=@CITY, STATE=@STATE,
                        COUNTRY=@COUNTRY, ZIP=@ZIP, PHONE1=@PHONE1, FAX=@FAX, PHONE2=@PHONE2      
                WHERE CUSTNMBR = @CUSTNMBR  
            
            END

        ELSE

            BEGIN

                --Add a new row if customer number doesn't already exist insert new values in the dynamics table RM00102
                INSERT INTO RM00102 (CUSTNMBR, ADRSCODE, ADDRESS1, CITY, STATE, COUNTRY, ZIP, PHONE1, FAX, PHONE2)
                VALUES (@CUSTNMBR, @ADRSCODE, @ADDRESS1, @CITY, @STATE, @COUNTRY, @ZIP, @PHONE1, @FAX, @PHONE2) 
                SET @ErrorReturn = @@ERROR

            END

        --Fill cursor with new recordset
        FETCH NEXT FROM WorkCursor
            INTO @CUSTNMBR, @CUSTNAME, @ADDRESS1, @CITY, @STATE, @COUNTRY, @ZIP, @PHONE1, @FAX, @FRSTINDT, @CNTCPRSN, @PHONE2
   
    END

CLOSE WorkCursor
DEALLOCATE WorkCursor

END
GO

Pri Keys: RM00101 - CUSTNMBR
RM00102 - CUSTNMBR, ADRSCODE