Copying file between mount points between different servers is straight forward and can be done using scp or ftp command. But transfering file between asm diskgroups of different servers will be a tricky one.
If you are getting error like ASMCMD-8201: (Bad argc for RDBMS:ASMCMD-8201) , then enable trace to find the exact error.
In the below example, we will try to copy a file test.dmp from asm diskgroup of source-host to asm diskgroup of target-host.