ansible disaster!

[root@Ansible ~]# ansible agent -m copy -a ‘src=wel.txt dest=/home/wel.txt owner=root group=root mode=600’
ERROR! Attempted to read “/root/dir/wel.txt” as ini file: /root/dir/wel.txt:1: Expected key=value host variable assignment, got: to
[root@Ansible ~]# ansible agent -m ping
ERROR! Attempted to read “/root/dir/wel.txt” as ini file: /root/dir/wel.txt:1: Expected key=value host variable assignment, got: to

I only excute one command,ansible told me error。but after that all ansible function gone! I need help。