Hi all I have a problem with our RAC env. which I cant figure out. Oracle is 10r2 and the OS is RHEL 3 and we have 2 nodes in the RAC. If i from machine 1 connects to rac1, rac2 it works and if I connect to rac I am switched between the nodes as expected. The same is for machine 2. But if I connects from my pc (oracle 10r2 here also) and try to connect to rac I alway gets into rac2, but 40% of the times I get the message: ORA-12545: Connect failed because target host or object does not exist which I intertpret as it tries to log me onto rac1 but fails to do so. Am I right in my assumption and where to start solve the problem? /johan -- //www.freelists.org/webpage/oracle-l