Ubuntu LTS 12.04 & pwrsrc 4.8.6-3
From Proview Wiki
If you are going to build 4.8.6-3 from source and need a web interface, you need to replace GeDyn.java (./pwrsrc_4.8.6-3/java/jpwr/jop/src/GeDyn.java) with GeDyn.java because of a bug.