Problems in Handling String Variables with Pro*C

Question

I have a Pro*C program that select one record from a table. Although I don't have any NULL values in this record, I got the following error:
ORA-01405: fetched column value is NULL.
This problem only accurs when I try to retrieve[b] characters. Everything works fine when I handle numbers.
I also tried to use indicators with the output value from the query. Another error was returned:
ORA-03106: fatal two-task communication protocol error.
I am not sure wheather the problem is from my program or some configuration of the environment or the client.
The database (Oracle 9i) is in a remote machine, and I am using Oracle Client (9i) in my machine running Tru64 OS.
The code that I am using is as follows:
EXEC SQL BEGIN DECLARE SECTION;
int db_classId;
char db_neId[101];
EXEC SQL END DECLARE SECTION;
EXEC SQL SELECT class_id, ne_id INTO :db_classId, :db_neId
FROM NE_ROUTE WHERE ne_id like 'BA%';
Can anyone help on this issue? Is it something to do with NLS_LANG parameter?
I just want to note down that all queries work fine with SQL Plus

Answer 1

Hi,
I used different select statements as you suggested, but I still get the same error. I also changed the statement to make sure it doesn't return a NULL value.
I tried the following cases
1. EXEC SQL SELECT 'name' INTO :db_neId FROM DUAL;
and I get >> ORA-01405: fetched column value is NULL.
2. EXEC SQL SELECT NVL('name','name2') INTO :db_neId FROM DUAL;
and I get >> ORA-01405: fetched column value is NULL.
3. EXEC SQL SELECT 'name' INTO :db_neId :ind_ne FROM DUAL;
and I get >> ORA-03106: fatal two-task communication protocol error.
I haven't try to change the precompiler options yet. The program is very simple as I only use to test the connection with the database. I am just trying to retieve any character from the database.
Any suggestions?