There were 12 warnings (use warnings() to see them)
Error in socketConnection("localhost", port = port, server = TRUE, blocking = TRUE,  : 
  cannot open the connection
Calls: RegCluster ... makePSOCKcluster -> newPSOCKnode -> socketConnection
In addition: Warning message:
In socketConnection("localhost", port = port, server = TRUE, blocking = TRUE,  :
  port 11526 cannot be opened
Execution halted