RuntimeError: Please make sure that Ghostscript is installed

[rafiepstein]

Hello,
Trying to run a single line: (Python 2.7.15 under Pycharm)

import camelot
tables = camelot.read_pdf(inpFile)

Full Stack:
C:\Python27\python.exe "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py" --multiproc --qt-support=auto --client 127.0.0.1 --port 51131 --file C:/Users/Rafi/Documents/re_FOCUS/StrataVAR/Python/testPDFTables.py
pydev debugger: process 8344 is connecting

Connected to pydev debugger (build 183.5429.31)
Traceback (most recent call last):
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py", line 1741, in
main()
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py", line 1735, in main
globals = debugger.run(setup['file'], None, None, is_module)
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py", line 1135, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "C:/Users/Rafi/Documents/re_FOCUS/StrataVAR/Python/testPDFTables.py", line 24, in
tables = camelot.read_pdf(inpFile)
File "C:\Python27\lib\site-packages\camelot\io.py", line 106, in read_pdf
layout_kwargs=layout_kwargs, **kwargs)
File "C:\Python27\lib\site-packages\camelot\handlers.py", line 162, in parse
layout_kwargs=layout_kwargs)
File "C:\Python27\lib\site-packages\camelot\parsers\lattice.py", line 351, in extract_tables
self._generate_image()
File "C:\Python27\lib\site-packages\camelot\parsers\lattice.py", line 186, in generate_image
from ..ext.ghostscript import Ghostscript
File "C:\Python27\lib\site-packages\camelot\ext\ghostscript_init.py", line 24, in
from . import _gsprint as gs
File "C:\Python27\lib\site-packages\camelot\ext\ghostscript_gsprint.py", line 229, in
raise RuntimeError('Please make sure that Ghostscript is installed')
RuntimeError: Please make sure that Ghostscript is installed

Process finished with exit code 1

Windows-10-10.0.17763
('Python', '2.7.15 (v2.7.15:ca079a3ea3, Apr 30 2018, 16:22:17) [MSC v.1500 32 bit (Intel)]')
('NumPy', '1.16.1')
('OpenCV', '4.0.0')
('Camelot', '0.7.2')

Ghostscript 64 installed under Win10 64 bit:

C:\Users\Rafi>gswin64c.exe -version
GPL Ghostscript 9.26 (2018-11-20)
Copyright (C) 2018 Artifex Software, Inc. All rights reserved.

There is a path to C:\Program Files\gs\gs9.26\bin and to C:\Program Files\gs\gs9.26\bin.

Tracking the source of the Python exception, it seems that the code in __win32_finddll(): fails to find the Registry key.

Using Regedit, there is a key:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\GPL Ghostscript\9.26
with two entries
GS_DLL: C:\Program Files\gs\gs9.26\bin\gsdll64.dll
and
GS_LIB - C:\Program Files\gs\gs9.26\bin;C:\Program Files\gs\gs9.26\lib;C:\Program Files\gs\gs9.26\fonts

The statement QueryInfoKey(k1) returns (in _gsprint.py)
(0, 0, 131955508546095202L), thus range(0,0) is [] and the loop fails, so the function returns None.

Any suggestions?
Thanks,
--Rafi

[vinayak-mehta]

Did you try the solutions mentioned in #184?

[rafiepstein]

Hello Vinayak,
I am not sure what you mean by "solution mentioned"...
As far as I could tell, no solution relevant to Windows environment is mentioned.
Ghoscript is installed as per the test suggested. PATH is setup correctly.
The problem seems to be in _gsprint.py,
line: for num in range(0, QueryInfoKey(k1)[0]):
as QueryInfoKey(k1)
(0, 0, 131955739057984515L)
thus range(0, QueryInfoKey(k1)[0]) is empty, and it doesn not find the dll.

Any suggestions?

[tal-yifat]

I'm having a similar issue, and couldn't solve it using the solutions mentioned in #184. I'd appreciate any suggestions.

Environment
Darwin-17.7.0-x86_64-i386-64bit
Python 3.6.7 | packaged by conda-forge | (default, Feb 28 2019, 02:16:08)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)]
NumPy 1.16.2
OpenCV 3.4.4
Camelot 0.7.1
Ghostscript 9.22

I'm using the foo.pdf from the documentation.

tables = camelot.read_pdf('foo.pdf')

And getting the error message:

---

OSError Traceback (most recent call last)
~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/ext/ghostscript/_gsprint.py in
232 try:
--> 233 libgs = cdll.LoadLibrary('libgs.so')
234 except OSError:

~/anaconda3/envs/camelot/lib/python3.6/ctypes/init.py in LoadLibrary(self, name)
425 def LoadLibrary(self, name):
--> 426 return self._dlltype(name)
427

~/anaconda3/envs/camelot/lib/python3.6/ctypes/init.py in init(self, name, mode, handle, use_errno, use_last_error)
347 if handle is None:
--> 348 self._handle = _dlopen(self._name, mode)
349 else:

OSError: dlopen(libgs.so, 6): image not found

During handling of the above exception, another exception occurred:

RuntimeError Traceback (most recent call last)
in
----> 1 tables = camelot.read_pdf('foo.pdf')

~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/io.py in read_pdf(filepath, pages, password, flavor, suppress_stdout, layout_kwargs, **kwargs)
104 kwargs = remove_extra(kwargs, flavor=flavor)
105 tables = p.parse(flavor=flavor, suppress_stdout=suppress_stdout,
--> 106 layout_kwargs=layout_kwargs, **kwargs)
107 return tables

~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/handlers.py in parse(self, flavor, suppress_stdout, layout_kwargs, **kwargs)
159 for p in pages:
160 t = parser.extract_tables(p, suppress_stdout=suppress_stdout,
--> 161 layout_kwargs=layout_kwargs)
162 tables.extend(t)
163 return TableList(tables)

~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/parsers/lattice.py in extract_tables(self, filename, suppress_stdout, layout_kwargs)
349 return []
350
--> 351 self._generate_image()
352 self._generate_table_bbox()
353

~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/parsers/lattice.py in _generate_image(self)
184
185 def _generate_image(self):
--> 186 from ..ext.ghostscript import Ghostscript
187
188 self.imagename = ''.join([self.rootname, '.png'])

~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/ext/ghostscript/init.py in
22 #
23
---> 24 from . import _gsprint as gs
25
26

~/anaconda3/envs/camelot/lib/python3.6/site-packages/camelot/ext/ghostscript/_gsprint.py in
238 libgs = ctypes.util.find_library('gs')
239 if not libgs:
--> 240 raise RuntimeError('Please make sure that Ghostscript is installed')
241 libgs = cdll.LoadLibrary(libgs)
242

RuntimeError: Please make sure that Ghostscript is installed

[QCTW]

I have the same issue with the standalone version of Ghostscript (install version is not allowed due to the IT policy in my company). I had set the bin and lib directories of the Ghostscript (standalone) in PATH but Camelot is still trying to find the Ghostscript from the Windows registry.

[pantuts]

In macos brew install ghostscript

[tal-yifat]

In my case, Ghostscript is successfully installed. Shouldn't this be a bug?

[KAIXIE]

Ghostscript is successfully installed. Shouldn't this be a bug? yes it is a bug!!!!!

[vinayak-mehta]

I'll look into this over the weekend.

[wangxiangtao]

exact same issue as well. I have the same issue with the standalone version of Ghostscript (install version is not allowed due to the IT policy in my company). I had set the bin and lib directories of the Ghostscript (standalone) in PATH but Camelot is still trying to find the Ghostscript from the Windows registry.

[vinayak-mehta]

I currently don't have a Windows machine to reproduce this, let me install it on my current laptop. I believe we should just try to get rid of ghostscript with #96.

[GuillaumeDesforges]

Same issue here

[marcoloew333]

Same for me. Even if i install ghostscript and python3-ghostscript via pip.
macOS with PyCharm. Both latest versions.

Had the same Issue on Windows. I just installed Ghostscript installer from this Website: https://www.ghostscript.com/download/gsdnld.html My Code is now having no issues.