Sounds like permissions on the cluster: ie the host can't see/connect to the nodes.

Dear Rob,n I just contacted the admin team. They said that access to the compute nodes is handled by the LSF scheduler and direct ssh access to the compute nodes is not allowed. If my simulation requires ssh type of access, the 'blaunch' ( command should provide the same type of functionality. nI was trying to use blaunch for fluent but can not find any guides from ANSYS Learning Forum. Do you by chance have any information about integrating blaunch with Fluent?.thanks!nAlann