You tried to install AutoCAD®, but the installation failed and error code 1639 was displayed in the log file.
Note: The message text for the Windows Installer error code 1639 is "Invalid command line argument."
This error will occur if there are special characters such as double quotation marks, extended characters, or an empty string (null value) in the user name or the company name.
To resolve the error, run the installation again in a "clean boot" state while logged on to Windows as User "Administrator".
For detailed instructions on performing a clean boot, refer to one of the following web pages (depending on your operating system):
In addition, verify that the company name entered in the Deployment wizard or in the AutoCAD Installation dialog box does not contain any spaces or special characters.
Products: AutoCAD;AutoCAD LT