Hi Peter,
This usually happens if a library (qsqlocispatial.dll) is not able to load its
dependencies.
I usually use Process Monitor
(https://docs.microsoft.com/en-us/sysinternals/downloads/procmon) or Dependency
Walker (https://www.dependencywalker.com/) to track those issues.
Are you trying to access an Oracle database? Then you might have to install the
Oracle Instant Client:
https://www.oracle.com/database/technologies/instant-client/winx64-64-downloads.html
Best regards,
Stefan
From: QGIS-Developer On Behalf Of
peter.steib...@t-online.de
Sent: Friday, March 19, 2021 3:00 PM
To: qgis-developer@lists.osgeo.org
Subject: [QGIS-Developer] QOCISPATIAL driver cannot be loaded
Hello,
I just compiled the qsqlocialspatial.dll from the QGis project and tried to use
it with QSqlDatabase.
QSqlDatabase db2 = QSqlDatabase::addDatabase("QOCISPATIAL");
When I startet the program it looked like the detection oft he sqldriver was
successful.
QFactoryLoader::QFactoryLoader() looking at
"C:/Qt/5.14.2/msvc2017_64/plugins/sqldrivers/qsqlocispatial.dll"
Found metadata in lib
C:/Qt/5.14.2/msvc2017_64/plugins/sqldrivers/qsqlocispatial.dll, metadata=
{
"IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
"MetaData": {
"Keys": [
"QOCISPATIAL8",
"QOCISPATIAL"
]
},
"archreq": 0,
"className": "QOCISpatialDriverPlugin",
"debug": false,
"version": 331264
}
Got keys from plugin meta data ("QOCISPATIAL8", "QOCISPATIAL")
Later when I tried to actually use the driver I got the following output.
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Peter
Steibert/source/repos/QtWidgetsApplication2/x64/Release/sqldrivers" ...
"QtWidgetsApplication2.exe" (Win32):
"C:\Qt\5.14.2\msvc2017_64\plugins\sqldrivers\qsqlocispatial.dll" geladen. Das
Modul wurde ohne Symbole erstellt.
"QtWidgetsApplication2.exe" (Win32): "C:\Windows\System32\wsock32.dll" geladen.
"QtWidgetsApplication2.exe" (Win32): "C:\Windows\System32\wsock32.dll" wurde
entladen.
"QtWidgetsApplication2.exe" (Win32):
"C:\Qt\5.14.2\msvc2017_64\plugins\sqldrivers\qsqlocispatial.dll" wurde entladen.
Cannot load library
C:\Qt\5.14.2\msvc2017_64\plugins\sqldrivers\qsqlocispatial.dll: Das angegebene
Modul wurde nicht gefunden.
QLibraryPrivate::loadPlugin failed on
"C:/Qt/5.14.2/msvc2017_64/plugins/sqldrivers/qsqlocispatial.dll" : "Cannot load
library C:\\Qt\\5.14.2\\msvc2017_64\\plugins\\sqldrivers\\qsqlocispatial.dll:
Das angegebene Modul wurde nicht gefunden."
QSqlDatabase: QOCISPATIAL driver not loaded
QSqlDatabase: available drivers: QSQLITE QOCISPATIAL QOCISPATIAL8 QODBC QODBC3
QPSQL QPSQL7
Thanks in advance for your help
Peter
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