To use printer sharing, the printer driver on the host machine and the client machine must be the exact same version. In Mac OS 7.6 and later,
the Color StyleWriter 2500 driver version was changed to 2.2.1. On System 7.5.5 and earlier, the version number is 2.2. This is what causes the error message.
Workarounds1. Copy the 2.2.1 version of the driver onto a floppy disk and replace the older driver on all the System 7.5.5 and earlier systems.
2. Custom install the StyleWriter Family software from the latest version of system software in the lab.