Verify that the node process is synchronized and ready.
If number of nodes per copyset is greater than one, and the node you have started is not the primary node, then wait for the node to synchronize with the primary.
To verify synchronization, check the status using the administration tool.
For the fastest and most efficient start sequence, it is important to start only one node process at a time, and wait for it to synchronize before starting the next node process.