Compilation problems using NVL function in Pro*C subselect

Question

I have come across a weird oracle problem. When I execute the following query in SQLPlus it works but when
I include it in Pro*C code in a EXEC SQL statement it gives syntax errors and fails to compile. Any idea what I am doing wrong.
SELECT DISTINCT
     A.ID_PERSON,
     C.ID_STAGE_PERSON_LINK ,
     A.NM_PERSON_FULL,
     A.NBR_PERSON_AGE,
     A.ADDR_PERSON_ST_LN_1,
     A.ADDR_PERSON_CITY,
     A.ADDR_PERSON_ZIP,
     A.CD_PERSON_STATE,
     A.CD_PERSON_COUNTY,
     A.NBR_PERSON_PHONE,
     C.CD_STAGE_PERS_REL_INT
     FROM
          PERSON A,
          STAGE_PERSON_LINK C
     WHERE
     C.ID_CASE = 88776721
     AND          A.IND_INVALID_PERS IS NULL
     AND          C.CD_STAGE_PERS_TYPE = 'PRN'
     AND          C.ID_PERSON = A.ID_PERSON
     AND C.ID_STAGE_PERSON_LINK =
NVL (
               (SELECT MAX(F.ID_STAGE_PERSON_LINK)
               FROM STAGE_PERSON_LINK F
               WHERE F.ID_PERSON=C.ID_PERSON
               AND F.ID_CASE = C.ID_CASE
                    AND F.CD_STAGE_PERS_TYPE = 'PRN'
                    AND F.CD_STAGE_PERS_REL_INT IS NOT NULL)
               (SELECT MAX(G.ID_STAGE_PERSON_LINK)
               FROM STAGE_PERSON_LINK G
               WHERE G.ID_PERSON=C.ID_PERSON
               AND G.ID_CASE = C.ID_CASE
                    AND G.CD_STAGE_PERS_TYPE = 'PRN')
AND A.ID_PERSON NOT IN
SELECT S.ID_PERSON
FROM STAGE_PERSON_LINK S,STAGE T
WHERE S.ID_CASE = C.ID_CASE
AND S.ID_CASE = T.ID_CASE
AND S.ID_STAGE = T.ID_STAGE
AND T.CD_STAGE <> 'INT'
MINUS
SELECT H.ID_PERSON
FROM STAGE_PERSON_LINK H, STAGE F
WHERE H.ID_CASE = F.ID_CASE
AND H.ID_STAGE = F.ID_STAGE
AND H.ID_CASE = C.ID_CASE
AND H.CD_STAGE_PERS_ROLE <> 'XE'
AND F.CD_STAGE <> 'INT'
This query returns data when run in sqlplus.When used in a Pro*C C program and compiled the precompiler complains with syntax errors when used with EXEC SQL DECLARE CLSS82D_CURSOR CURSOR FOR < query above >.However removing the NVL function and retaining the subselect clause compiles but that is not what I want to do.
Syntax error at line 262, column 20, file clss82d.pc:
Error at line 262, column 20 in file clss82d.pc
SELECT MAX( F.ID_STAGE_PERSON_LINK )
...................1
PCC-S-02201, Encountered the symbol "MAX" when expecting one of the following:
( ) * + - / . @ | at, day, hour, minute, month, second, year,
The symbol "(" was substituted for "MAX" to continue.
Syntax error at line 263, column 10, file clss82d.pc:
Error at line 263, column 10 in file clss82d.pc
FROM STAGE_PERSON_LINK F
.........1
PCC-S-02201, Encountered the symbol "FROM" when expecting one of the following:
, ) * + - / | at, day, hour, minute, month, second, year,

Answer 1

Pro*C works bit differently tha sqlplus. try removing the blank line after
SELECT MAX(G.ID_STAGE_PERSON_LINK)
FROM STAGE_PERSON_LINK G
WHERE G.ID_PERSON=C.ID_PERSON
AND G.ID_CASE = C.ID_CASE
AND G.CD_STAGE_PERS_TYPE = 'PRN')
good luck,
Gauranga