Unable to log-in using PL/SQL Developer
I have problem with logging into my database using Pl/SQL Developer. All connection parameters are defined in TNSNAMES.ORA and work perfectly with SQL Developer.
Unfortunately, when I try to connect using PL/SQL Developer, I am receiving a message with no content. I am using version 9.0.6.1665.
Is this a known issue and what might I be doing wrong?
Here is image of this strange error:
Answer
Probably you might have already resolved your issue, but I would like to add my solution here.
I faced the same issue of blank error screen on trying to logon to PL/SQL Developer. OS Win 7 Pl/SQL Dev 7.1.3 Oracle client 10g
Step 1: I checked the output of "tnsping". It resulted in error - Message 3511 not found The cause was incorrect setting of ORACLE_HOME value in my environment. After correcting ORACLE_HOME, tnsping started to work but I still got the same blank error screen in PL/SQL Developer. Edit: Refer the link for more info on setting ORACLE_HOME correctly.
Step 2: I started PL/SQL Developer with option "Run as Administrator". After providing the administrator password, I was able to logon successfully through PL/SQL Developer
Step 3: Later I changed the User Account Control settings (Win 7 Control Panel > User Accounts > Change User Account Control settings). I set it to "Never notify" and restarted my PC. Thereafter, I ran PL/SQL Developer as normal user and did not face the issue.
I hope this helps someone.