Has anyone got any idea about this issue. I setup a small cluster, with just 9 nodes. On install the headnode was also a compute node. I changed my mind about this and wanted to make it just a headnode. So I right clicked on the node in "node management", picked "change role" and selected "none", i.e it is just a head node and won't run compute jobs. Now I can't bring the node back online, the "bring online" option is grayed out when I right click on the node.
Is there a command line alternative that I could try?
Needless to say I have rebooted and it hasn't helped.