error on plot with octave_kernel

error octave_kernel

[IPKernelApp] ERROR | Exception in message handler:
Traceback (most recent call last):
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/IPython/kernel/zmq/kernelbase.py", line 213, in dispatch_shell
    handler(stream, idents, msg)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/IPython/kernel/zmq/kernelbase.py", line 362, in execute_request
    user_expressions, allow_stdin)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/_metakernel.py", line 312, in do_execute
    retval = self.do_execute_direct(code)
  File "/home/dean/.home/opt/jupyter/lib/python2.7/site-packages/octave_kernel.py", line 76, in do_execute_direct
    self._make_figs(plot_dir)
  File "/home/dean/.home/opt/jupyter/lib/python2.7/site-packages/octave_kernel.py", line 154, in _make_figs
    super(OctaveKernel, self).do_execute_direct(cmd.replace('\n', ''))
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/process_metakernel.py", line 61, in do_execute_direct
    output = self.wrapper.run_command(code.rstrip(), timeout=None)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/replwrap.py", line 138, in run_command
    if self._expect_prompt(timeout=timeout) == 1:
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/replwrap.py", line 101, in _expect_prompt
    timeout=timeout)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/pexpect.py", line 1649, in expect
    timeout, searchwindowsize, async)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/pexpect.py", line 1670, in expect_list
    return exp.expect_loop(timeout)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/pexpect.py", line 232, in expect_loop
    return self.timeout(e)
  File "/home/dean/.home/opt/jupyter/local/lib/python2.7/site-packages/metakernel/pexpect.py", line 197, in timeout
    raise TIMEOUT(msg)
TIMEOUT: Timeout exceeded.
<metakernel.pexpect.spawnu object at 0x7f3231f0a1d0>
version: 3.3
command: /usr/bin/octave
args: ['/usr/bin/octave']
searcher: None
buffer (last 100 chars): u't line 423, column 14\r\nerror:   /usr/share/octave/3.8.1/m/plot/util/saveas.m at line 105, column 3\r\n'
before (last 100 chars): u't line 423, column 14\r\nerror:   /usr/share/octave/3.8.1/m/plot/util/saveas.m at line 105, column 3\r\n'
after: <class 'metakernel.pexpect.TIMEOUT'>
match: None
match_index: None
exitstatus: None
flag_eof: False
pid: 7149
child_fd: 41
closed: False
timeout: 30
delimiter: <class 'metakernel.pexpect.EOF'>
logfile: None
logfile_read: None
logfile_send: None
maxread: 2000
ignorecase: False
searchwindowsize: None
delaybeforesend: 0.05
delayafterclose: 0.1
delayafterterminate: 0.1