# SQL optimizer do not start from Taod or command line

**URL:** <https://forums.toadworld.com/t/sql-optimizer-do-not-start-from-taod-or-command-line/54125>\
**Category:** Toad for SQL Server\
**Created:** [November 18, 2021, 12:35pm UTC](https://forums.toadworld.com/t/sql-optimizer-do-not-start-from-taod-or-command-line/54125 "2021-11-18T12:35:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Krashan](https://avatars.discourse-cdn.com/v4/letter/k/f05b48/32.png) [@Krashan](https://forums.toadworld.com/u/Krashan)\
**Post date:** [November 18, 2021, 12:35pm UTC](https://forums.toadworld.com/t/sql-optimizer-do-not-start-from-taod-or-command-line/54125/1 "2021-11-18T12:35:25Z")

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Hi  
Freshly installed Toad\_for\_SQLServer\_2020\_Full.exe with demo licence  
works fine as long as I do not try to open SQL Optimizer.  
SQL optimizer only blinks with startup licence screen and that all.

Sytem is Win10. I do not see any specific messages in event log, Quest.Tech.log and logfiles.  
shows only :

| Error | Exception in TParaBase function SetKey | |
| --- | --- | --- |
| Call Stack | Exception in TParaBase function SetKey | |
| Error | Insufficient system resources exist to complete the requested service. | |
| Call Stack | at Microsoft.Win32.RegistryKey.Win32Error(Int32 errorCode, String str) at Microsoft.Win32.RegistryKey.SetValue(String name, Object value, RegistryValueKind valueKind) at Microsoft.Win32.RegistryKey.SetValue(String name, Object value) at Quest.Tuning.Preferences.TParaBase.SetKey(RegistryKey aKey, String aName, String aValue) | |

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**Author:** ![Gary.Jerep](https://sea1.discourse-cdn.com/quest/user_avatar/forums.toadworld.com/gary.jerep/32/205_2.png) [@Gary.Jerep](https://forums.toadworld.com/u/Gary.Jerep)\
**Post date:** [November 18, 2021, 5:52pm UTC](https://forums.toadworld.com/t/sql-optimizer-do-not-start-from-taod-or-command-line/54125/2 "2021-11-18T17:52:01Z")

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Welcome back... very strange what you're describing... gotta ask, though.... how much memory on the machine, are you close to maxing out your disk, and how many other applications are hogging up the RAM? (See below for min requirements re RAM and disk, from the release notes).

Were both Toad and SQL Optimizer installed from the same installer?  
Also, can you launch SQL Optimizer successfully by itself?

Otherwise, assuming a healthy workstation, might need to take this one to Quest Support.

 ![image](https://global.discourse-cdn.com/quest/original/2X/1/12750c0b6140f0f1c71b9ddb13417e5e955f035a.png)