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I am down the rabbit hole on TNS-12560.

I am working on a windows 7 computer. I have X86 & X64 versions of Oracle clients installed. The DB(s) are on remote computers. I can use TNSPING, SQLPLUS, SQLDEVELOPER to get to the DBs using the various TNSNAMES.ORA files and have no problems.

I am working on an X86 VB.NET program using VS2008 (also tried a different program using VS2010 with similar results). I am using Oracle.DataAccess.dll X86 in my project. The configuration in VS2008 is X86, I have changed my path on the system to have the X86 oracle path first.

When I run TNSPING it points to the X86 path's SQLNET.ORA. When I try to login to the DB I get the following in my SQLNET.LOG file;

TNS-12560: Message 12560 not found; No message file for product=NETWORK, facility=TNS
ns secondary err code: 0
nt main err code: 530

TNS-00530: Message 530 not found; No message file for product=NETWORK, facility=TNS
    nt secondary err code: 38
    nt OS err code: 0

I turned on tracing and in the trace file I notice that it references one of the other (X64) client home folders;

2017-01-11 13:25:36.744480 : Attempted load of system pfile source C:\app\paul\product\11.2.0\client_2\network\admin\sqlnet.ora
2017-01-11 13:25:36.744535 : Parameter source loaded successfully

Where TNSPING uses the x86 folder;

C:\>tnsping XXXX

TNS Ping Utility for 32-bit Windows: Version - Production on 11-JAN-2
017 12:59:33

Copyright (c) 1997, 2010, Oracle.  All rights reserved.

Used parameter files:

This leads me to believe that it is trying to mix X86 & X64 components, but I do not know what controls where it looks for the path.

The only other bit of error stuff from the trace that I do not know how to interpret is;

2017-01-11 13:25:36.760176 : nserror:nsres: id=0, op=65, ns=12560, ns2=0; nt[0]=530, nt[1]=38, nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0
2017-01-11 13:25:36.760189 : nsopen:unable to open transport

So, I am down the rabbit hole, and need some help in finding a map to get out. Anyone with pointers, will be rewarded "bigly" (to coin a phrase).

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