check stats for specific treequota

I want to check stats for specific treequota which is park under VDM "customer1" & datamover: server_2

eg: customer1_custfs/cust_data1

$ server_stats movername -i -c count interval -m fs.qtreefile

so the command would be, server_stats server_2 -i -c -m customer1_custfs.cust_data1

but i receive following error:

ERROR (13421969427): Invalid statpath name.