iscan (Image Scan! for Linux) doesn't work when trying to connect to an Epson scanner from the network. This is because the package doesn't include the nonfree network plugin, which is required for using a scanner from the network.
If you take a look at the official .rpm x64 package, you'll find a plugins/iscan-network-nt-1.1.1-1.x86_64.rpm package inside. Extracting that package and moving the library to /usr/lib64/iscan/network actually solve the issue, but I would expect a regular user not to have to deal with that mess.
As it's a nonfree library (according to the README.rst in the official rpm package), I don't know what is the best solution for this. Could it be included with your iscan package, or should it require a new package, something like a script that downloads the network library and installs it properly as an option?
Apologies for any lack of information or if I broke any rule here. This is my first ever attempt at contributing to a Linux distro. Yup, Solus is actually that great.
iscan source: http://support.epson.net/linux/src/scanner/iscan/
.deb and .rpm packages: http://support.epson.net/linux/en/iscan_c.php?version=1.0.4