Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?

[mrmishmash]

I'm having an issue installing fbchat on Windows 10 (64-bit). I installed the Visual Studio libraries, but when I did, I get the following error message:

Is there any way to fix this?

[madsmtm]

libxml2 is a requirement of lxml. I would recommend either going to them, or perhaps trying to install libxml2? Also, a quick google search revealed this

Also, next time, copy-paste the relevant errors instead of posting screenshots ;)

[mrmishmash]

Hey. Yes, I knew that I needed libxml2, but nothing I tried was working. Yes, I tried that link, but it wasn't working because I was using Python 3.7.* while I should have been using Python 3.6.*. Anyway, got everything to work now, great software you've written! Thanks for the reply.

…

On Wed, Nov 15, 2017 at 10:07 AM, Mads Marquart ***@***.***> wrote: libxml2 is a requirement of lxml. I would recommend either going to them, or perhaps trying to install libxml2? Also, a quick google search revealed this <https://stackoverflow.com/a/33785756> Also, next time, copy-paste the relevant errors instead of posting screenshots ;) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#230 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AKwCi0teDusDNKJV68hf0sEorY0ld14Nks5s2qnigaJpZM4Qdn0f> .

[Priya174]

Hey. Yes, I knew that I needed libxml2, but nothing I tried was working. Yes, I tried that link, but it wasn't working because I was using Python 3.7.* while I should have been using Python 3.6.. Anyway, got everything to work now, great software you've written! Thanks for the reply.
…
On Wed, Nov 15, 2017 at 10:07 AM, Mads Marquart @.**> wrote: libxml2 is a requirement of lxml. I would recommend either going to them, or perhaps trying to install libxml2? Also, a quick google search revealed this https://stackoverflow.com/a/33785756 Also, next time, copy-paste the relevant errors instead of posting screenshots ;) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#230 (comment)>, or mute the thread https://github.com/notifications/unsubscribe-auth/AKwCi0teDusDNKJV68hf0sEorY0ld14Nks5s2qnigaJpZM4Qdn0f .

Can you tell me how you made it work ?I am facing the same issue.

[KratikaNishad]

copying src\lxml\usedoctest.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml_elementpath.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml_init_.py -> build\lib.win-amd64-3.9\lxml
creating build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes_init_.py -> build\lib.win-amd64-3.9\lxml\includes
creating build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\builder.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\clean.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\defs.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\diff.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\ElementSoup.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\formfill.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\html5parser.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\soupparser.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\usedoctest.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_diffcommand.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_html5builder.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_setmixin.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_init_.py -> build\lib.win-amd64-3.9\lxml\html
creating build\lib.win-amd64-3.9\lxml\isoschematron
copying src\lxml\isoschematron_init_.py -> build\lib.win-amd64-3.9\lxml\isoschematron
copying src\lxml\etree.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\etree_api.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\lxml.etree.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\lxml.etree_api.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\includes\c14n.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\config.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\dtdvalid.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\etreepublic.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\htmlparser.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\relaxng.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\schematron.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\tree.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\uri.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xinclude.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xmlerror.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xmlparser.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xmlschema.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xpath.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xslt.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes_init_.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\etree_defs.h -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\lxml-version.h -> build\lib.win-amd64-3.9\lxml\includes
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources\rng
copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\rng
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_skeleton_for_xslt1.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
creating build\temp.win-amd64-3.9
creating build\temp.win-amd64-3.9\Release
creating build\temp.win-amd64-3.9\Release\src
creating build\temp.win-amd64-3.9\Release\src\lxml
"C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -DCYTHON_CLINE_IN_TRACEBACK=0 -Isrc -Isrc\lxml\includes -IC:\Users\g\anaconda3\include -IC:\Users\g\anaconda3\Include "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt" /Tcsrc\lxml\etree.c /Fobuild\temp.win-amd64-3.9\Release\src\lxml\etree.obj -w
cl : Command line warning D9025 : overriding '/W3' with '/w'
etree.c
C:\Users\g\AppData\Local\Temp\pip-install-wb_gdt1c\lxml_31e3dfcd7aee4ce1b586776dfcdc8d53\src\lxml\includes/etree_defs.h(14): fatal error C1083: Cannot open include file: 'libxml/xmlversion.h': No such file or directory
Compile failed: command 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe' failed with exit code 2
creating Users
creating Users\g
creating Users\g\AppData
creating Users\g\AppData\Local
creating Users\g\AppData\Local\Temp
"C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -I/usr/include/libxml2 "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt" /TcC:\Users\g\AppData\Local\Temp\xmlXPathInittbjts030.c /FoUsers\g\AppData\Local\Temp\xmlXPathInittbjts030.obj
xmlXPathInittbjts030.c
C:\Users\g\AppData\Local\Temp\xmlXPathInittbjts030.c(1): fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe' failed with exit code 2

---

Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?

---

[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for lxml
error: subprocess-exited-with-error

Running setup.py install for lxml did not run successfully.
exit code: 1

[94 lines of output]
Building lxml version 4.5.0.
Building without Cython.
ERROR: b"'xslt-config' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"
** make sure the development packages of libxml2 and libxslt are installed **

Using build configuration of libxslt
running install
C:\Users\g\anaconda3\lib\site-packages\setuptools\command\install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
warnings.warn(
running build
running build_py
creating build
creating build\lib.win-amd64-3.9
creating build\lib.win-amd64-3.9\lxml
copying src\lxml\builder.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml\cssselect.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml\doctestcompare.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml\ElementInclude.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml\pyclasslookup.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml\sax.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml\usedoctest.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml_elementpath.py -> build\lib.win-amd64-3.9\lxml
copying src\lxml_init_.py -> build\lib.win-amd64-3.9\lxml
creating build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes_init_.py -> build\lib.win-amd64-3.9\lxml\includes
creating build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\builder.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\clean.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\defs.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\diff.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\ElementSoup.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\formfill.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\html5parser.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\soupparser.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html\usedoctest.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_diffcommand.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_html5builder.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_setmixin.py -> build\lib.win-amd64-3.9\lxml\html
copying src\lxml\html_init_.py -> build\lib.win-amd64-3.9\lxml\html
creating build\lib.win-amd64-3.9\lxml\isoschematron
copying src\lxml\isoschematron_init_.py -> build\lib.win-amd64-3.9\lxml\isoschematron
copying src\lxml\etree.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\etree_api.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\lxml.etree.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\lxml.etree_api.h -> build\lib.win-amd64-3.9\lxml
copying src\lxml\includes\c14n.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\config.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\dtdvalid.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\etreepublic.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\htmlparser.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\relaxng.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\schematron.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\tree.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\uri.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xinclude.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xmlerror.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xmlparser.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xmlschema.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xpath.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\xslt.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes_init_.pxd -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\etree_defs.h -> build\lib.win-amd64-3.9\lxml\includes
copying src\lxml\includes\lxml-version.h -> build\lib.win-amd64-3.9\lxml\includes
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources\rng
copying src\lxml\isoschematron\resources\rng\iso-schematron.rng -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\rng
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\RNG2Schtrn.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl
copying src\lxml\isoschematron\resources\xsl\XSD2Schtrn.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl
creating build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_abstract_expand.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_dsdl_include.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_message.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_schematron_skeleton_for_xslt1.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\iso_svrl_for_xslt1.xsl -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
copying src\lxml\isoschematron\resources\xsl\iso-schematron-xslt1\readme.txt -> build\lib.win-amd64-3.9\lxml\isoschematron\resources\xsl\iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
creating build\temp.win-amd64-3.9
creating build\temp.win-amd64-3.9\Release
creating build\temp.win-amd64-3.9\Release\src
creating build\temp.win-amd64-3.9\Release\src\lxml
"C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -DCYTHON_CLINE_IN_TRACEBACK=0 -Isrc -Isrc\lxml\includes -IC:\Users\g\anaconda3\include -IC:\Users\g\anaconda3\Include "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt" /Tcsrc\lxml\etree.c /Fobuild\temp.win-amd64-3.9\Release\src\lxml\etree.obj -w
cl : Command line warning D9025 : overriding '/W3' with '/w'
etree.c
C:\Users\g\AppData\Local\Temp\pip-install-wb_gdt1c\lxml_31e3dfcd7aee4ce1b586776dfcdc8d53\src\lxml\includes/etree_defs.h(14): fatal error C1083: Cannot open include file: 'libxml/xmlversion.h': No such file or directory
Compile failed: command 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe' failed with exit code 2
"C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe" /c /nologo /O2 /W3 /GL /DNDEBUG /MD -I/usr/include/libxml2 "-IC:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt" /TcC:\Users\g\AppData\Local\Temp\xmlXPathInit7tjimyan.c /FoUsers\g\AppData\Local\Temp\xmlXPathInit7tjimyan.obj
xmlXPathInit7tjimyan.c
C:\Users\g\AppData\Local\Temp\xmlXPathInit7tjimyan.c(1): fatal error C1083: Cannot open include file: 'libxml/xpath.h': No such file or directory
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.32.31326\bin\HostX86\x64\cl.exe' failed with exit code 2

---

Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?

---

[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
WARNING: No metadata found in c:\users\g\anaconda3\lib\site-packages
error: legacy-install-failure

Encountered error while trying to install package.

lxml

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure

[KratikaNishad]

I am having this error while giving command.
pip install browser

[padurbin]

I had this problem when using pip install on a mac. The solution was to create a unicode subdirectory in /opt/local/include/unicode and copy needed header files to it

In other words:
cd /opt/local/include/unicode
sudo mkdir unicode

Then move there and copy needed files
cd unicode
sudo cp ../localpointer.h ../ucnv_err.h ../uenum.h .

the header ucnv_err.h needed these to be in the subdirectory

[Soufia9500]

Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
Perhaps try: xcode-select --install
*********************************************************************************
error: command '/usr/bin/clang' failed with exit code 1
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for lxml
Running setup.py clean for lxml
Failed to build lxml
ERROR: Could not build wheels for lxml, which is required to install pyproject.toml-based projects