This error normally occurs when you are trying to import a dump file which is residing on an NFS file system or you are copying a file from NFS filesystem onto ASM. The way to resolve the problem is to mount the NFS filesystem with the correct options.
1. Unmount the NFS file system where the file is residing
umount -f /filesystem
2. Mount with correct options
mount -F nfs -o rw,bg,hard,rsize=32768,wsize=32768,vers=3,forcedirectio,nointr,proto=tcp,suid host:/folder1/to1 /folder2/to2
Now try importing the dump/ copying the file to ASM again and it should work like a charm.