puppet "Error 400 on SERVER : Could not find class"

There are TOO many post and solution for this problem, but still i am not able to solve it. I am using puppet 3.7.5

Following is details

root@p1:/etc/puppet/manifests# ls -l
total 8
-rw-r--r-- 1 root root 40 Apr  9 12:37 nodes.pp
-rw-r--r-- 1 root root 18 Apr  9 11:58 site.pp
root@p1:/etc/puppet/manifests# cat nodes.pp
node 'wa.ro.XXX' {
        include mytest
}
root@p1:/etc/puppet/manifests# cat site.pp
import 'nodes.pp'

Module path

root@p1:/etc/puppet/manifests# puppet master --configprint modulepath
/etc/puppet/modules:/usr/share/puppet/modules

root@p1:/etc/puppet# tree -L 2 -d modules
modules
- configfiles
  -- files
  -- manifests
- services
  -- files
  -- manifests

root@p1:/etc/puppet# cat modules/services/manifests/init.pp
class mytest {
       file { '/tmp/puppettestfgt56666' :
          mode    => 0644,
          content => "This Learning Puppet VM's IP address is ${ipaddress}",
         }        
}

On agent

root@wa:/var/cache# puppet agent --no-daemonize --onetime --verbose
Info: Retrieving plugin
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Could not find class mytest for wa.ro.XXX on node wa.ro.XXX
Notice: Using cached catalog
Info: Applying configuration version '1428561896'
Notice: Finished catalog run in 0.07 seconds

Solution

Class mytest can and will only be found in module mytest. You cannot just throw it into module services and expect Puppet to be able to look it up from there.