ORA-12154 TNS resolve error with ProC

Question

<p>Hi all,
<br>
<p>
I have a program written in ProC which works fine when it connects to a local database. However, it is unable to connect to a remote database. The code for making the connection is:
<p>
<i>
EXEC SQL BEGIN DECLARE SECTION;<br>
char name[20];<br>
char pwd[20];<br>
char dbname[20];<br>
char dbstring[20];<br>
EXEC SQL END DECLARE SECTION;<br>
strcpy(name, "admin");<br>
strcpy(pwd, "adminadmin");<br>
strcpy(dbname, "userdb");<br>
strcpy(dbstring, "userdb");<br>
EXEC SQL WHENEVER SQLERROR DO printf( "Connection Error = %s", sqlca.sqlerrm.sqlerrmc);<br>
EXEC SQL CONNECT :name IDENTIFIED BY :pwd AT :dbname USING :dbstring;<br>
</i>
<p>
The content of fthe file tnsnames.ora:<br>
<i>
userdb =<br>
(DESCRIPTION =<br>
(ADDRESS_LIST =<br>
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.30.21)(PORT = 1521))<br>
)<br>
(CONNECT_DATA =<br>
(SID = userdb)<br>
)<br>
)<br>
</i>
<p>
I can "tnsping userdb" and "telnet 192.168.30.21 1521" but the program keeps generating the ORA-12154 connection error.
The version of my oracle client is 9.2.0.1.0
The version of the db server is 8.1.7
Could any one give me some advice please. I had been searching for the solutions for days but failed. Please help. Thanks.

Answer 1

<p>
i do a file search "find / -name tnsnames.ora", here is the result:
<p>
/home/oracle/dbscript/database/tnsnames.ora<br>
/u00/app/oracle/product/9.2.0.1.0/network/admin/samples/tnsnames.ora<br>
/u00/app/oracle/product/9.2.0.1.0/network/admin/tnsnames.ora<br>
<p>
the first one is not found in the path