Problem with System Copy

Hi all,

I have a problem with an activity of Homogeneous System Copy.

I need to change the RFC groups into transaction SMQS (from production copy to quality),

but when I try to modify che group with Edit -> Change Group, I obtain this error:

Function not possible in this state

and the scheduler status is in WAITING.

I have not been never this problem with other system copy.

Are ther anyone which help me?

thank you

Davide