To whom it may concern: "ImportError: DLL load failed" solved. I finally got the python modules involved working with Apache and mod_wsgi.
I took the following steps: 1. uninstall Microsoft Visual C++ 2008 2. install MinGW 3. Reboot Mercurial 3. recompile Mercurial with MSVCR90 using MinGW (setup.py build -c mingw32) 4. then setup.py install --skip-build (compiling and running linked against MSVCRT did not work; for that I did setup.py build -c mingw32 >build.log and manually created a batch with changed -lmsvcr* directives) Psycopg2 5. On another box I had a compiled version linked against MSVCRT.DLL which worked on my box as well. 6. then setup.py install --skip-build In all cases I could run the modules standalone from the interactive python prompt. They only failed when used with Apache mod_wsgi. The components now are linked against runtime libs as follows: python 2.6 -> c:\windows\winsxs \x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.21022.8_x- ww_d08d0375\MSVCR90.DLL apache (httpd.exe) -> c:\windows\system32\MSVCRT.DLL mod_wsgi -> c:\windows\winsxs \x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.21022.8_x- ww_d08d0375\MSVCR90.DLL psycopg2 -> c:\windows\system32\MSVCRT.DLL mercurial -> MSVCR90.DLL (base85.pyd, no path in the dll) I suspect there is a problem with the binaries linked against different runtime libraries. Graham, should I log this as a bug with mod_wsgi? Regads, Andreas -- bala...@gmail.com On Jun 21, 11:42 pm, baloan <balo...@googlemail.com> wrote: > How to solve ImportError: DLL load failed: The specified module could > not be found. > > To analyse the problem first downloadhttp://www.dependencywalker.com > and check the unresolved DLL dependencies of your modules. > > In my _psycopg.pyd (which can be opened with Dependency Walker) I can > see LIBPQ.DLL, LIBEAY32.DLL and MSVCR90.DLL being unresolved. I have > built/compiled psycopg2-2.2.1 on Windows XP SP3 with Visual Studio > 2008. > > The LIBPQ.DLL and LIBEAY32.DLL were easily resolved by adding ... > \PostgrSQL\8.4\bin and ...\PostgrSQL\8.4\lib to the PATH. > > The MS VC runtime library MSVCR90.DLL is more difficult and I have not > solved the problem yet. The simple approach of copying MSVCR90.DLL to > C:\Windows\system32 leads to the following dialog box when requesting > a wsgi page that import additional modules: > > ------------------------------------------------------------------------------- > c:\Program Files\Apache2.2\bin > > R6034 > An application has made an attempt to load the C runtime library > incorrectly. > Please contact the application's support team for more information. > ------------------------------------------------------------------------------- > > Python native modules like os, sys seem to work, though. Modules like > hg or psycopg2 which contain compiled DLLs (or pyd) seem to fail. > > Looking how python.exe depend on the runtime library I find: c:\windows > \winsxs\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4148_x- > ww_d495ac4e\MSVCR90.DLL. This long path seems to be related with > WinSXS (side-by-side) which allows to operate multiple versions of a > DLL in one Windows installation. > > Potentially the incompatibility is created during module compilation > when the MSVCR90.DLL is not resolved properly. Importing psycopg2 or > starting hg from the interactive prompt works fine. > > Who can contribute to solve the issue? > > Regards, Andreas > balo...@gmail.com > > On Jun 19, 7:21 pm, baloan <balo...@googlemail.com> wrote: > > > Hi Graham, > > > thanks for the swift repsonse. Apache is run as user "web" which I can > > confirm in task manager. The python console check which works was run > > as user "web". Running Apache from an interactive prompt and trying > > hw.wsgi with "import psycopg2" fails like when run as a service. > > > Both Apache from an interactive prompt and the python interpreter > > (interactive console test) use the same > > a) user > > b) PATH > > c) permission > > with different results. > > > What else might be wrong? > > > -- > > Andreas > > > ------------- > > [SC] GetServiceConfig SUCCESS > > > SERVICE_NAME: apache2.2 > > TYPE : 10 WIN32_OWN_PROCESS > > START_TYPE : 3 DEMAND_START > > ERROR_CONTROL : 1 NORMAL > > BINARY_PATH_NAME : "C:\Program Files\Apache2.2\bin > > \httpd.exe" -k runservice > > LOAD_ORDER_GROUP : > > TAG : 0 > > DISPLAY_NAME : Apache2.2 > > DEPENDENCIES : Tcpip > > : Afd > > SERVICE_START_NAME : .\web > > ------------- > > > On Jun 19, 3:40 pm, Graham Dumpleton <graham.dumple...@gmail.com> > > wrote: > > > > One more thing. As I understand it, DLLs can also be searched on user > > > exec executable search Path in Windows. If you are relying on that for > > > user account, the Apache user account will not likely have it set up. > > > > Graham > > > > On 19 June 2010 23:06, Graham Dumpleton <graham.dumple...@gmail.com> > > > wrote: > > > > > Apache runs as special service user and not you. Thus that user needs > > > > to have appropriate access permissions to everything that is required. > > > > If the DLLs are readable to that user, it will not work. > > > > > Another issue that comes up is where packages are installed for a > > > > specific user and not for all users. This can result in registry > > > > settings only being set for user who installs it and will be missing > > > > in machine context and thus Apache user will not see them. > > > > > Graham > > > > > On 19 June 2010 22:57, baloan <balo...@googlemail.com> wrote: > > > >> Hello, > > > > >> I have tried to setup apache with hg, trac and web2py running on > > > >> Windows XP SP3 but failed. Below is a detailed list of components I > > > >> have installed. > > > > >> hg, trac and web2py work fine standalone (tracd 8000, web2py - > > > >> a'<recycle>') but when I try to run them behind Apache with WSGI I see > > > >> ImportErrors when importing psycopg2 or mercurial specific modules. > > > >> The installation seems to be fine because using PostgreSQL works from > > > >> the command line (see below). > > > > >> I have then setup a 'Hello World' WSGI to prove importing psycopg2 is > > > >> the problem. See below for sys.path and Apache log details. > > > > >> Who knows what is wrong and how to fix? > > > > >> Regards, Andreas > > > >> balo...@gmail.com > > > > >> ------------- > > > >> Windows XP SP3 > > > >> Python 2.6.5 > > > >> psycopg 2.2.1 > > > >> trac 0.12 > > > >> mercurial 1.5.4 > > > >> web2py 1.79.1 > > > > >> Apache 2.2.15 > > > >> mod_wsgi 3.0 (win32 ap22py26) > > > > >> PostgreSQL 8.4.3-1 > > > >> ------------- > > > > >> -- console -- > > > >> D:\Home\web\apache\conf>python > > > >> Python 2.6.5 (r265:79096, Mar 19 2010, 21:48:26) [MSC v.1500 32 bit > > > >> (Intel)] on win32 > > > >> Type "help", "copyright", "credits" or "license" for more information. > > > >>>>> import psycopg2 as pg > > > >>>>> db = pg.connect(database='invest', user='invest', password='invest') > > > >>>>> db.close() > > > >>>>> quit() > > > >> ------------- > > > > >> -- Apache configuration -- > > > >> ... > > > >> WSGIPythonHome "C:/Apps/Python26" > > > >> WSGIPythonPath "C:/Apps/Python26/Lib/site-packages" > > > >> WSGIScriptAlias /hw "D:/home/web/apache/cgi-bin/hw.wsgi" > > > >> WSGIScriptAlias /hg "D:/home/web/apache/cgi-bin/hgwebdir.wsgi" > > > >> WSGIApplicationGroup %{GLOBAL} > > > >> ... > > > >> ------------- > > > > >> -- hgwebdir.wsgi -- > > > >> from mercurial import demandimport; demandimport.enable() > > > >> from mercurial.hgweb.hgwebdir_mod import hgwebdir > > > >> application = hgwebdir('D:/home/web/hg/etc/hgweb.config') > > > >> ------------- > > > > >> -- Apache error log -- > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] mod_wsgi > > > >> (pid=2332): Target WSGI script 'D:/Home/web/apache/cgi-bin/ > > > >> hgwebdir.wsgi' cannot be loaded as Python module. > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] mod_wsgi > > > >> (pid=2332): Exception occurred processing WSGI script 'D:/Home/web/ > > > >> apache/cgi-bin/hgwebdir.wsgi'. > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] Traceback > > > >> (most recent call last): > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "D:/ > > > >> Home/web/apache/cgi-bin/hgwebdir.wsgi", line 51, in <module> > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] > > > >> application = hgwebdir('D:/home/web/hg/etc/hgweb.config') > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\hgweb\ > > > >> \hgwebdir_mod.py", line 52, in __init__ > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] > > > >> self.refresh() > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\hgweb\ > > > >> \hgwebdir_mod.py", line 61, in refresh > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] u = > > > >> ui.ui() > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\ui.py", line 38, in > > > >> __init__ > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] for f > > > >> in util.rcpath(): > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\demandimport.py", line > > > >> 75, in __getattribute__ > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] > > > >> self._load() > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\demandimport.py", line > > > >> 47, in _load > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] mod = > > > >> _origimport(head, globals, locals) > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\util.py", line 552, in > > > >> <module> > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] from > > > >> windows import * > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\demandimport.py", line > > > >> 85, in _demandimport > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] return > > > >> _origimport(name, globals, locals, fromlist) > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\windows.py", line 21, > > > >> in <module> > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] > > > >> posixfile.__doc__ = osutil.posixfile.__doc__ > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\demandimport.py", line > > > >> 75, in __getattribute__ > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] > > > >> self._load() > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] File "C:\ > > > >> \Apps\\Python26\\lib\\site-packages\\mercurial\\demandimport.py", line > > > >> 47, in _load > > > >> [Sat Jun 19 14:32:35 2010] [error] [client 192.168.178.24] mod = > > > >> _origimport(head, globals, locals) > > > >> [Sat Jun 19 > > ... > > read more » -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To post to this group, send email to modw...@googlegroups.com. To unsubscribe from this group, send email to modwsgi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/modwsgi?hl=en.
