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Fix SQL Server 2022 Express Invalid Command-Line Argument Error (-206805237)
Question details
The user is attempting to resolve an invalid command-line argument error that prevents the installation of SQL Server 2022 Express.
- Product
- SQL Server 2022 Express
- Device & OS
- not provided
- Scenario
- Installing SQL Server 2022 Express
- Observed behavior
- The setup process fails, displaying an invalid command-line argument error message (such as error code -206805237), often triggered by residual files or incorrect installation parameters.
Avoid manually deleting SQL Server folders from your Program Files, as this can cause registry corruption and further complicate the setup process.
Collect Setup Logs and Request Microsoft Q&A Support
Since manual deletion rarely resolves parameter errors, gathering the official setup logs and seeking specialized help from Microsoft experts is the most reliable approach.
SQL Server installation issues involving command-line arguments are highly specific to the system environment and setup parameters. Troubleshooting requires analyzing the underlying setup logs to pinpoint exactly which parameter or residual registry key is causing the setup to fail.
Open File Explorer and navigate to 'C:\Program Files\Microsoft SQL Server\160\Setup Bootstrap\Log'. Look for the folder matching the timestamp of your failed installation attempt.
Inside the timestamped folder, open the 'Summary.txt' and 'Detail.txt' files. Search for 'error' or the specific code '-206805237' and copy the relevant lines detailing the failure.
Go to the official Microsoft Q&A platform (learn.microsoft.com/en-us/answers) and navigate to the SQL Server support tags.
Create a new support thread. Paste the complete error message, your installation parameters, and the relevant sections of your setup logs so SQL Server specialists can identify the conflict.
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Frequently Asked Questions
What does error code -206805237 mean in SQL Server setup?
This error code typically indicates that an invalid command-line argument or parameter was passed to the SQL Server setup engine. It is often caused by conflicting residual files from previous installations or incorrect custom installation scripts.
Can I fix the invalid command-line argument by deleting old SQL folders?
No, manually deleting SQL Server folders (like those in Program Files) is highly discouraged. It leaves residual registry keys intact, which will continue to cause setup failures. You should use the official uninstaller or seek expert support.
Where can I find the SQL Server 2022 installation logs?
By default, SQL Server 2022 setup logs are located in the directory 'C:\Program Files\Microsoft SQL Server\160\Setup Bootstrap\Log\'. Within this directory, you will find folders named with the timestamps of each installation attempt containing the Summary.txt and Detail.txt files.
