You must have AppleShare Workstation software version 3.6.4 installed before starting a network installation of Mac OS 7.6.
If you have AppleShare Workstation software version 3.6, 3.6.1, or 3.6.2, you need to upgrade to version 3.6.4 before you can install Mac OS 7.6 over a network. This software is provided in the Utilities folder on the Mac OS 7.6 CD-ROM disc. Install this version of AppleShare before proceeding with the Mac OS 7.6 installation.