Cognos Impromptu 7.4 causing 'TNS:could not resolve service name'

Hi there,

We're aware Cognos 7.4 doesn't run on Windows 7 (in fact, when I install it on there, it comes up with the same error).

So, we're trying to Thinapp it. Steps:

1. Prescan on clean Win XP SP3 VM.
2. Install Oracle 9.2 Runtime Client
3. Copy TNSNAMES.ORA & SQLNET.ORA to C:\oracle\ora92\network\ADMIN folder.
4. Install Cognos Impromptu 7.4.
5. Test connectivity to database using SQL PLUS & Cognos Impromptu. Both work.
6. Postscan & Build.
7. Install Thinapp MSI onto Win7 machine.
8. Test connectivity using SQL PLUS. Works fine using the TNSNAMES.ORA file.
9. Test connectivity using Cognos Imprompu.
   1. Run Cognos.
   2. 'Catalog' menu --> 'Open'
   3. Browse to .CAT file and open.
   4. Select the correct User Class
   5. Type the password in and select OK.
   6. Error appears which says following: Error number -4: <CR><CR>DMS-E-CONNECTREJECT, A connection has been rejected by the remote interface during operation 'attach database'. <CR>ORA-12154: TNS:could not resolve service name
10. The TNSNAMES entry is correct.
11. I have installed Cognos to 'C:\Cognos\cer5' folder as per IBM instructions (tho they were about making 7.5 work, not 7.4)

Has anyone else got any ideas?

Best wishes,

Simon