Printing problems with High Sierra

Since updating to High Sierra, printing appears to be broken.

I have an iMac, and an Epson PX730WD. The iMac is wired ethernet connected to the LAN, the printer connects to the same network via wifi. All worked fine under Sierra.

Attempting to print to the printer under HS gives an unspecified Communication Error. Resetting the printing system gives an error when trying to add the printer, either as AirPrint or using the Epson driver. Connecting the printer via USB seems to work correctly.

I can ping the printer in Terminal, and the Epson status webpage works correctly, so the printer is connected to the net OK.

Thoughts??

Thanks

Geoff