Problem with ODP.Net and TNSNames

[jdw]

I am using asp.net (Framework 1.1) with Oracle 9i and ODP.Net version
9.2.0.401. I am developing using a local copy of IIS version 5.1. When
I use a connection string to connect to Oracle utilising a data source
in my TNSNames.ora file initially everything is fine and I can connect
without any problem.
After about 2 minutes as I move from page to page and requery the
database I seem to loose the connection with the error "ORA-12154:
TNS:could not resolve service name".

I am using the following line in my web.config file to create the
connection string:-
<add key="Main.ConnectionString" value="data source=dev.ora;User
Id=xxxx;Password=xxxx;persist security
info=false;Pooling=true;Connection Lifetime=120;Min Pool Size=0;Incr
Pool Size=1;Decr Pool Size=1;Max Pool Size=20;"/>

Interestingly if I change this to the relevant data source entry within
my TNSNames file:-
<add key="Main.ConnectionString" value="data
source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=xxxxxx)(PORT=xxxx)))(CONNECT_DATA
=(SERVICE_NAME = dev.xxx.xxx.xx)) );User
Id=xxxx;Password=xxxx;Pooling=true;Connection Lifetime=120;Min Pool
Size=0;Incr Pool Size=1;Decr Pool Size=1;Max Pool Size=20;"/>

Then I do not have any problems. I would prefer to use TNSNames rather
than entering the datasource directly. Has anyone any ideas why I loose
the connection?

 

[jdw]

I have now resolved this. It was caused by "Autheticated Users" not
having permissions on the folder containing my Oracle Home. According
to the Oracle site "If you install Oracle9i Release 2 (9.2.0.1.0) on a
computer running Windows
with an NTFS partition, the contents of ORACLE_HOME directory will not
be
visible to users who are authenticated on that machine. These
permissions
were not set properly when the software was installed.
Applications that were working fine with previous versions of Oracle
software
will stop working when they upgrade to Oracle 9.2."