Failed to parse Contingent-FF problem files

[yangshuo11]

Hello, I am currently working on the Contingent-FF planner with ROSPlan framework. The rosplan_demo package contains the sample contingent planning domain and problem files (d.pddl and p.pddl). When I use the rosplan_knowledge_base node to parse these files, it seems that the "oneof" keyword in p.pddl cannot be parsed correctly. The logs are as follows:

[ INFO] [1650264534.083254032]: KCL: (/rosplan_problem_interface) Ready to receive
[ INFO] [1650264534.088610618]: KCL: (/rosplan_knowledge_base) Starting a PDDL Knowledge Base
[ INFO] [1650264534.160658655]: KCL: (/rosplan_planner_interface) Ready to receive
[ INFO] [1650264534.163223023]: KCL: (/rosplan_knowledge_base) Parsing domain
[ INFO] [1650264534.163415824]: KCL: (/rosplan_knowledge_base) Parsing domain: /.../rosplan_demos/common/d.pddl.
[ INFO] [1650264534.183689199]: KCL: (/rosplan_knowledge_base) Parsing initial state
[ INFO] [1650264534.183837896]: KCL: (/rosplan_knowledge_base) Parsing Problem File: /.../rosplan_demos/common/p.pddl.
[ WARN] [1650264534.184903860]: KCL: (/rosplan_knowledge_base) There were syntax errors in the problem file.
[ INFO] [1650264534.184968576]: KCL: (/rosplan_knowledge_base) Ready to receive

Can anyone provide a clue? Thanks in advance!