After installing libsane1 1.0.27-1~experimental2ubuntu2.1 from artful-proposed, I was able to complete the test case successfully and install the Epson iscan .deb's.
After installing libsane1 1.0.27- 1~experimental2 ubuntu2. 1 from artful-proposed, I was able to complete the test case successfully and install the Epson iscan .deb's.