This looks good.
Does DB Studio still show an error?
If you still see the error in DB Studio, try the following check on java level.
1. On the windows server, where Database Studio is installed, search for sapdbc.jar. It could be under c:\sapdb\clients\SID\runtime\jar
2. cd \sapdb\clients\DatabaseStudio
3. java -jar C:\sapdb\clients\SID\runtime\jar\sapdbc.jar -d SID -n 192.168.10.100:7210 -u <superdba>,<pwd> -a db_state
Assuming that 192.168.10.100 is still the bigmama server.
4. On the AIX server execute:
x_cons SID show act
What are the results of 3. andl 4.?
Regards,
Barbara