Hashed Output Mappers throw unable to instantiate error

[8:41 AM] Mats Rynge: #pegasus.dir.storage.mapper = Flat
#pegasus.dir.storage.deep = True
pegasus.dir.storage.mapper = Hashed
[8:41 AM] Mats Rynge: He gets:
[8:41 AM] Mats Rynge: 2016-09-20 10:35:24,031 fsurfer.log  INFO    : Pegasus output: 2016.09.20 10:35:23.839 CDT: [FATAL ERROR]
[1]: Instantiating Output Mapper at edu.isi.pegasus.planner.transfer.mapper.OutputMapperFactory.loadInstance(OutputMapperFactory.java:161)
[2]: Invalid static initializer method name for edu.isi.pegasus.planner.transfer.mapper.impl.Hashed at java.io.File.<init>(File.java:317)
[8:41 AM] Mats Rynge: So slightly different error, but pretty much the same