Postgresql driver is not found
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Re: POSTGRES QPSQL not loading
Hello!
I have old problem with new soft. Got a message "Cannot load library C:\Qt\5.15.2\mingw81_64\plugins\sqldrivers\qsqlpsql.dll"
on Win 10 Pro x64 and Postgresql 13 x64. The path is valid.
I've smoked all web sources about this problem, used all advices but nothing changed. Is there any solution? -
@alxdef
Start with checking with a suitable Dependency Walker. Otherwise what didn't work in the proposals in the thread you reference? -
Hi and welcome to devnet,
On Qt Creator, add the QT_DEBUG_PLUGINS environment variable set to 1 in the Run part of the project panel. You'll have more information about what is going wrong.
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Hi and welcome to devnet,
On Qt Creator, add the QT_DEBUG_PLUGINS environment variable set to 1 in the Run part of the project panel. You'll have more information about what is going wrong.
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In the list of plugins information dumped in your application, you should have why the plugin failed to load. You did not show that in what you posted.
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In the list of plugins information dumped in your application, you should have why the plugin failed to load. You did not show that in what you posted.
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Can you should the complete output of your application ?
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@SGaist
Here the part of application output about DLL load failure:Got keys from plugin meta data ("QPSQL7", "QPSQL") QFactoryLoader :: QFactoryLoader () checking directory path "…/ build-MCS-Desktop_Qt_5_15_2_MinGW_64_bit-Debug / Shell / debug / sqldrivers" … Cannot load library C: \ Qt \ 5.15.2 \ mingw81_64 \ plugins \ sqldrivers \ qsqlpsql.dll: The specified module could not be found. QLibraryPrivate :: loadPlugin failed on "C:/Qt/5.15.2/mingw81_64/plugins/sqldrivers/qsqlpsql.dll": "Cannot load library C: \\ Qt \\ 5.15.2 \\ mingw81_64 \\ plugins \\ sqldrivers \\ qsqlpsql.dll: The specified module could not be found. " QSqlDatabase: QPSQL driver not loaded QSqlDatabase: available drivers: QSQLITE QODBC QODBC3 QPSQL QPSQL7Tell me what additional information is needed?
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Just remembered something, check that you have also copied the dependencies of the PostgreSQL .dll.
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Just remembered something, check that you have also copied the dependencies of the PostgreSQL .dll.
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The OpenSSL related
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Then run Dependency Walker on these.
The next likely candidate is the VC runtime dll. -
I meant that you should run Dependency Walker on the OpenSSL dlls and that it would have likely been the VC runtime missing.
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I meant that you should run Dependency Walker on the OpenSSL dlls and that it would have likely been the VC runtime missing.
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Did you copy the VC runtime in the same folder as the OpenSSL library ?
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Here DW output:
But DW fault with this:
- I tried to add paths to Postgres "bin" and "lib" folders - no way.
- Copy DLLs to different folders: "build", "plugins\build" and other variations - no luck.
- I didn't build database libraries myself.
@alxdef Your first screenshot tells you that libstdc++-6.dll is missing.
Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
Visit the Qt Academy at https://academy.qt.io/catalog -
@alxdef Your first screenshot tells you that libstdc++-6.dll is missing.
@Christian-Ehrlicher said in Postgresql driver is not found:
@alxdef Your first screenshot tells you that libstdc++-6.dll is missing.
Arf ! I missed that one. Good catch :-)
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@alxdef Your first screenshot tells you that libstdc++-6.dll is missing.
These libs are present in my app executable folder:
sqldrivers\qsqlpsql.dll platforms\qwindows.dll vcruntime140.dll Qt5Sql.dll Qt5Core.dll msvcrt.dll libstdc++-6.dll libssl-1_1-x64.dll libpq.dll libintl-8.dll libcrypto-1_1-x64.dll
