Try a 'symrdf -sid 4757 -rdfg 3 -file rdf.txt disable' command first, then re-try your commands.
Hi All,  I am planning to move few devices from 1 srdf group to the other.Currently all devices are in async mode and in consistent state.  I tried to execute the below command after splitting up the replication.(devices are in split status now)  symrdf -sid 4757 -rdfg 3 -file rdf.txt movepair -new_rdfg 4  But I am getting the below error:  The device does not have a valid RDF Consistency state for this operation  I found writes are happedning to the R1 devices.I tried to delete the pair also.getting same error.Any suggestion to resolve this issue.  Thanks in Advance.   
SRDF help needed