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Service pack #21 updates any prior GraFit version 4.0x to 4.0.21.
					
					 Click here for more information about the 
					changes in this update
 
					Click here for more information about the 
					changes in this update
The GraFit version number can be found using the Help 
	 About
    command.
 About
    command.
| N.B. This service pack only updates single-user GraFit installations. Please contact for updates to network versions of GraFit. | 
You must have already purchased and installed GraFit 4.
Download the Update4021.exe file by clicking on one of the links below. This is a self-extracting executable that contains the files necessary for the upgrade.
Run the Update4021.exe file. This will update your installation to the latest GraFit revision.
| Service Pack #21 (Update4021 .exe) (file size 2181 Kbytes, modification date 17 Jan 2004) | 
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| What if the update fails?The Update4021.exe file works by overwriting portions of your original installation. For this to function properly it is essential that the initial installation is valid. If any files are missing (they have been deleted or corrupted) then the update will fail. If this happens you should do the following: 
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