Could you help me see why there is such an error in my command

[ghost]

[chengmj2020@b4 mj]$ mrp /pub6/temp/cmj/mj/scrna_mutations-master/gex-depth-position/example.mro runfolder
Martian Runtime - v4.0.2
2020-12-10 09:56:33 [jobmngr] WARNING: configured to use 227GB of local memory, but only 211.1GB is currently available.
2020-12-10 09:56:33 [jobmngr] WARNING: The current process count limit 1024 is low. To increase parallelism, set ulimit -u 2066211.

MRO TypeError: unknown type "csv" for parameter "results"
at /pub6/temp/cmj/mj/scrna_mutations-master/gex-depth-position/mro/split_and_extract.mro:15
included from /pub6/temp/cmj/mj/scrna_mutations-master/gex-depth-position/example.mro:1

2020-12-10 09:56:33 Shutting down.