Cannot CD into Java Members (exception: null)

[forge-distribution] dist $ cd ~/Desktop/s/src/main/java/com/s/domain/Customer.java
[s] Customer.java $ cd id::long
**ERROR** [cd] null
[s] Customer.java $ cd id::long
**ERROR** [cd] command option 'at index [0]' must be of type 'Resource[]'
[s] Customer.java $ cd ..
**ERROR** [cd] null
[s] Customer.java $ cd ..
**ERROR** [cd] null