FilterError: django_libsass.SassCompiler: command not found

[J. Maceo Quintanar]

Hello again,

So this is my second installation of wagtail. I removed the first installation due to an error I was getting when trying to install Postgres. I actually ended up uninstalling Python too. So I started again from scratch, this time installing python 3.4.2 through homebrew (I was previously using python 2.78.) I installed my virtual env and then installed wagtail with no problems. 

After creating my project, I ran pip install -r requirements.txt and I got:

Requirement already satisfied (use --upgrade to upgrade): Django<1.8,>=1.7 in /Users/squintan/env/lib/python3.4/site-packages (from -r requirements.txt (line 2))

Requirement already satisfied (use --upgrade to upgrade): wagtail==0.8.4 in /Users/squintan/env/lib/python3.4/site-packages (from -r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): South==1.0.0 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): django-compressor>=1.4 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): django-libsass>=0.2 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): django-modelcluster>=0.4 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): django-taggit==0.12.2 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): django-treebeard==2.0 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): Pillow>=2.6.1 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): beautifulsoup4>=4.3.2 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): html5lib==0.999 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): Unidecode>=0.04.14 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): six>=1.7.0 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): requests>=2.0.0 in /Users/squintan/env/lib/python3.4/site-packages (from wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): django-appconf>=0.4 in /Users/squintan/env/lib/python3.4/site-packages (from django-compressor>=1.4->wagtail==0.8.4->-r requirements.txt (line 3))

Requirement already satisfied (use --upgrade to upgrade): libsass>=0.3.0 in /Users/squintan/env/lib/python3.4/site-packages (from django-libsass>=0.2->wagtail==0.8.4->-r requirements.txt (line 3))

Then I entered manage.py migrate with no errors, and then manage.py runserver. 

Sadly when I went to localhost:8000, I saw the following screen: 

FilterError at /

/bin/sh: django_libsass.SassCompiler: command not found

Request Method:	GET
Request URL:	http://localhost:8000/
Django Version:	1.7.3
Exception Type:	FilterError
Exception Value:	/bin/sh: django_libsass.SassCompiler: command not found
Exception Location:	/Users/squintan/env/lib/python3.4/site-packages/compressor/filters/base.py in input, line 173
Python Executable:	/Users/squintan/env/bin/python
Python Version:	3.4.2
Python Path:	['/Users/squintan/nerveraking', '/Users/squintan/env/lib/python34.zip', '/Users/squintan/env/lib/python3.4', '/Users/squintan/env/lib/python3.4/plat-darwin', '/Users/squintan/env/lib/python3.4/lib-dynload', '/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4', '/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/plat-darwin', '/Users/squintan/env/lib/python3.4/site-packages']

Error during template rendering

In template /Users/squintan/nerveraking/core/templates/base.html, error at line 15

/bin/sh: django_libsass.SassCompiler: command not found

5	<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]-->
6	<!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]-->
7	<!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]-->
8	<head>
9	<meta charset="utf-8" />
10	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
11	<title>{% block title %}{% if self.seo_title %}{{ self.seo_title }}{% else %}{{ self.title }}{% endif %}{% endblock %}{% block title_suffix %}{% endblock %}</title>
12	<meta name="description" content="" />
13	<meta name="viewport" content="width=device-width, initial-scale=1" />
14
15	{% compress css %}
16
17	<link rel="stylesheet" type="text/x-scss" href="{% static 'css/nerveraking.scss' %}">
18	{% endcompress %}
19
20	{% block extra_css %}
21
22	{% endblock %}
23	</head>
24
25	<body class="{% block body_class %}{% endblock %}">

I tried "pip install libsass", no luck. Later I saw somebody on the internet had a similar problem and they apparently fixed it by uninstalling everything sass related except for libsass and django_libsass. But when I try pip uninstall sass, I get "Cannot uninstall requirement sass, not installed".

Running from django_libsass import SassCompiler, from manage.py shell, I get:

Traceback (most recent call last):

  File "<console>", line 1, in <module>

  File "/Users/squintan/env/lib/python3.4/site-packages/django_libsass.py", line 3, in <module>

    import sass

  File "/Users/squintan/env/lib/python3.4/site-packages/sass.py", line 22, in <module>

    from _sass import (OUTPUT_STYLES, compile_dirname,

ImportError: dlopen(/Users/squintan/env/lib/python3.4/site-packages/_sass.so, 2): Symbol not found: __ZNSt12out_of_rangeD1Ev

  Referenced from: /Users/squintan/env/lib/python3.4/site-packages/_sass.so

  Expected in: /usr/lib/libstdc++.6.dylib

 in /Users/squintan/env/lib/python3.4/site-packages/_sass.so

Does anybody have any pointers as to what I may be doing wrong or where should I be looking? 

[Klemens]

this answer(s) seem legit: http://stackoverflow.com/a/22616554/194533

you might get further support at django_libsass.

and you might wanna use virtualenv.

regards,

klemens

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[Matthew Westcott]

From the final ImportError, it looks like the problem is occurring somewhere in the Python/C++ binding, which is handled by the 'libsass' library <https://github.com/dahlia/libsass-python>:

ImportError: dlopen(/Users/squintan/env/lib/python3.4/site-packages/_sass.so, 2): Symbol not found: __ZNSt12out_of_rangeD1Ev
Referenced from: /Users/squintan/env/lib/python3.4/site-packages/_sass.so
Expected in: /usr/lib/libstdc++.6.dylib
in /Users/squintan/env/lib/python3.4/site-packages/_sass.so

To isolate this, I'd suggest running 'pip install libsass' from a clean virtualenv - look out for any error messages during the build. Then, within the python shell, run:

import sass; sass

If the problem recurs, then it's somewhere within libsass-python or the libsass C++ library itself, which is outside my area of expertise...
If it succeeds (it should output something like "<module 'sass' from '.../local/lib/python2.7/site-packages/sass.pyc'>"), try uninstalling and reinstalling 'libsass' and 'django-libsass' within your Wagtail virtualenv, again looking out for any error messages.

Cheers,
- Matt

[J. Maceo Quintanar]

I think I may have figured out the problem but I still need to check a couple of more things. I just have a question: Is there a reason I shouldn't use the latest python 3.x instead the latest 2.7.x? 

J. Maceo Quintanar

 

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[J. Maceo Quintanar]

Nevermind the question about the python versions. I got that clarified in the docs.  

I did fix the error I was getting by eliminating a directory that was still keeping older python 3.4 and 2.7 files and changing paths in bash_profile. I will explain tomorrow with more precision and detail what I did so it can be helpful to others. Wagtail is up and running fine. I did find a few more issues with PostgreSQL and Elastic Search, but I will investigate on this later, and post questions/comments if needed.

J. Maceo Quintanar

 

[Matthew Westcott]

Bump :-)

J. Maceo Quintanar - if you have time to write up your findings, that would be much appreciated. Quite a lot of people have reported this error now, and while I don't think they all have the same root cause (the error is really just a 'catch-all' response to any ImportError) it would be great to get as much documentation of this as possible.

Cheers,
- Matt

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[Ferdy Rodríguez]

Hi, 

I was having the kinda the same error in a project deployed on webfaction, it all started because my user uploaded media was not rendering at that time I was just serving the files via nginx. When I was debugging I set DEBUG = True on production and then the media rendered however when I tried to get to Wagtail Admin I get the"FilterError: django_libsass.SassCompiler: command not found" error.

I tried everything that was posted in this conversation with no success. I even setup S3 storage for the static and media files and it still was showing the error. So finally the last thing that I did was update django-compressor to 1.5, I was using 1.4 at that time, after that everything started working again.

Hope that it helps someone.

Regards,

-Ferdy Rodriguez

[Andrey Shipilov]

Hey man. Which version of libsass are you using?

Andrey Shipilov

a...@andreyshipilov.com | www.andreyshipilov.com

Latest projects: Bear On Unicycle | The Bibliotheca Bar | Triple Cherry Coffee | IOGraphica

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[Matthew Westcott]

Wagtail itself no longer depends on django-libsass as of version 1.0 (although wagtaildemo still does) - but for the benefit of anyone googling this error in future, I've now put together a wiki page detailing steps to try:

https://github.com/torchbox/django-libsass/wiki/Troubleshooting

Cheers,
- Matt