Using the following properties works as expected:

props["pegasus.dir.storage.mapper"] = "Replica"
props["pegasus.dir.storage.mapper.replica"] = "YAML"
props["pegasus.dir.storage.mapper.replica.file"] = "output-rc.yml"

However, when removing "pegasus.dir.storage.mapper.replica", this fails and the planner throws the following error:

[1] edu.isi.pegasus.planner.mapper.MapperException: [Replica] Unable to retrive location from Mapper Replica Backend for lfn f1 for site local and operation put at edu.isi.pegasus.planner.mapper.output.Replica.mapAll(Replica.java:233)

Attached here is an example workflow that will give the same error.