To get the snapmirror information is a SnapDrive task, so maybe there are some issue there.
i would suggest to check if the Transport protocol settings are set up properly ( hostname with proper name resolution etc etc..) for both the source and destination SVMs
then check if the Nsf.config file you can find in the sanpdrive installation folder does contain all the the SVMs information.
Then you can try to reset the TPS setting in this way:
- Delete the SVMs details from TPS of SDW
- Add the SVMs to SDW in TPS.
- Click on "apply" and then click on "ok". [Do not click "ok" first].