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Oracle Database connection Issue

Hi all,


I'm having trouble connecting to my Oracle database. I'm following the instructions as in


I have installed a Gateway on my server machine (with Oracle database) and have Oracle client's installed on both my laptop and the server machine where I updated the tnsnames.ora files. The error I get back when trying to add a data source:


URI cluster:
Tijd:Wed Jul 05 2017 14:52:39 GMT+0200 (W. Europe Daylight Time)
Onderliggende foutcode:-2147467259
Onderliggend foutbericht:Oracle: ORA-12541: TNS:no listener
Microsoft.Data.Mashup.ValueError.Message:ORA-12541: TNS:no listener


The entry in tnsnames.ora looks like:


ebs =
(ADDRESS = (PROTOCOL = TCP)(HOST = 92.111.224.XXX)(PORT = 1521))
(SERVICE_NAME = ebsdb)


The information for adding a data source to my gateway in


Name: ebs

Type: Oracle

Server: 92.111.224.XXX

Verification: Basic

User: xxx

Password: xxx


It seems that there is no file called listener.ora in my Oracle client directory (D:\app\client\xxx\product\12.2.0\client_1\Network\Admin). Is that causing the error?


Yesterday, I got a different error doing the same thing, which was a Oracle ORA-12170 TNS connect timeout. No idea why I'm getting a different error today.


Help is very much appreciated!



Kind regards.

Community Support
Community Support

Hi @moravan,


As stated here, regarding the error "ORA-12541: TNS: no listener" and "ORA-12170: TNS:Connect timeout occurred", the issue is occurred if either the Oracle client is not installed, or if it is not configured properly. As data gateway is 64 bit, please make sure both Oracle server and Oracle client are 64 bit.


As the issue is more related to Oracle client configuration, please contact your Oracle admin or post a thread in Oracle forum to get dedicated support.


Best Regards,

Qiuyun Yu

Community Support Team _ Qiuyun Yu
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