Spyder won't start immediately after installing Mayavi

[d...@creare.com]

I've been having a lot of problems running Spyder 2.3.8 immediately after installing Mayavi.  The problem persists in Anaconda 2.4 and 2.4.1.  I just did a clean install of Anaconda and Spyder started normally.  Immediately after installing Mayavi Spyder refuses to launch.  The error message is shown below.

Any help appreciated as this has been driving me crazy.

Thanks!

Microsoft Windows [Version 6.1.7601]

Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\dbk>conda install mayavi

Fetching package metadata: ....

Solving package specifications: .......................

Package plan for installation in environment C:\Users\dbk\AppData\Local\Continuu

m\Anaconda2:

The following packages will be downloaded:

    package                    |            build

    ---------------------------|-----------------

    numpy-1.9.3                |           py27_0        23.5 MB  defaults

    traits-4.4.0               |           py27_0         373 KB  defaults

    vtk-5.10.1                 |           py27_0        16.3 MB  defaults

    pyface-4.4.0               |           py27_0         690 KB  defaults

    traitsui-4.4.0             |           py27_0         833 KB  defaults

    apptools-4.2.1             |           py27_0         282 KB  defaults

    envisage-4.4.0             |           py27_1         267 KB  defaults

    mayavi-4.4.0               |       np19py27_0        10.4 MB  defaults

    ------------------------------------------------------------

                                           Total:        52.6 MB

The following NEW packages will be INSTALLED:

    apptools: 4.2.1-py27_0     defaults

    envisage: 4.4.0-py27_1     defaults

    mayavi:   4.4.0-np19py27_0 defaults

    pyface:   4.4.0-py27_0     defaults

    traits:   4.4.0-py27_0     defaults

    traitsui: 4.4.0-py27_0     defaults

    vtk:      5.10.1-py27_0    defaults

The following packages will be DOWNGRADED:

    numpy:    1.10.1-py27_0 defaults --> 1.9.3-py27_0     defaults

Proceed ([y]/n)? y

Fetching packages ...

numpy-1.9.3-py 100% |###############################| Time: 0:00:08   2.92 MB/s

traits-4.4.0-p 100% |###############################| Time: 0:00:00   2.09 MB/s

vtk-5.10.1-py2 100% |###############################| Time: 0:00:09   1.88 MB/s

pyface-4.4.0-p 100% |###############################| Time: 0:00:00   4.41 MB/s

traitsui-4.4.0 100% |###############################| Time: 0:00:00   4.74 MB/s

apptools-4.2.1 100% |###############################| Time: 0:00:00   2.49 MB/s

envisage-4.4.0 100% |###############################| Time: 0:00:00   2.12 MB/s

mayavi-4.4.0-n 100% |###############################| Time: 0:00:04   2.60 MB/s

Extracting packages ...

[      COMPLETE      ]|##################################################| 100%

Unlinking packages ...

[      COMPLETE      ]|##################################################| 100%

Linking packages ...

[      COMPLETE      ]|##################################################| 100%

C:\Users\dbk>spyder

Traceback (most recent call last):

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\Scripts\spyder-script.py"

, line 2, in <module>

    start_app.main()

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\start_app.py", line 114, in main

    from spyderlib import spyder

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\spyder.py", line 155, in <module>

    from spyderlib.utils.environ import WinUserEnvDialog

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\utils\environ.py", line 17, in <module>

    from spyderlib.widgets.dicteditor import DictEditor

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\widgets\dicteditor.py", line 39, in <module>

    from spyderlib.widgets.dicteditorutils import (sort_against, get_size,

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\widgets\dicteditorutils.py", line 61, in <module>

    required_version=PANDAS_REQVER)

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\dependencies.py", line 70, in add

    installed_version)]

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\dependencies.py", line 32, in __init__

    self.installed_version = programs.get_module_version(modname)

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderl

ib\utils\programs.py", line 238, in get_module_version

    mod = __import__(module_name)

  File "C:\Users\dbk\AppData\Local\Continuum\Anaconda2\lib\site-packages\pandas\

__init__.py", line 7, in <module>

    from pandas import hashtable, tslib, lib

  File "pandas\src\numpy.pxd", line 157, in init pandas.tslib (pandas\tslib.c:10

2684)

ValueError: numpy.dtype has the wrong size, try recompiling

C:\Users\dbk>

[d...@creare.com]

One of my colleagues found the problem.  Installing mayavi downgrades bumpy from version 1.10.1 back down 1.9.3 which causes spyder to crash.

Updating bumpy back to 1.10.1 fixes the problem and seems to be OK with mayavi

This seems like both a problem with conda (allowing an unstable combination of packages) and spyder!

[d...@creare.com]

One my colleagues found the problem.

Installing mayavi via conda downgrades numpy from 1.10.1 to 1.9.3 which crashes Spyder

Upgrading bumpy back to 1.10.1 seems to fix the problem (and mayavi still seems to work).

This seems to indicate both a problem with Spyder and with conda (under anaconda 2.4 and 2.4.1)!

On Thursday, December 10, 2015 at 12:49:40 PM UTC-5, d...@creare.com wrote: