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Windows 10. I've not used my 3 installations of QGIS for 6 weeks maybe. I updated them via OSGeo4w but I get the error "The code execution cannot proceed because OpenCL.dll was not found. Reinstalling the program may fix the problem". enter image description here

OSGeo4w gives me the error

Package: qgis-common qgis-common.bat exit code -1073741515. Package: qgis-ltr-common qgis-ltr-common.bat exit code -1073741515

Attempting to open any of the QGIS installations gives me the error enter image description here

Reinstalling the programmes produces the same errors. Can anyone help please?

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  • This may well be a Windows 10 issue that is not allowing correct installation/opening of the OSGeo4W programmes? – IanGS Sep 27 '19 at 21:45
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    OpenCL is used for parallel processing for example in gdal. OSGeo4W comes wirh a opencl.dll and tries to install it through the qgis installation process. Did you install QGis with administrator privileges? – Andreas Müller Sep 28 '19 at 6:30
  • I've tried that 2 times, same errors occur. I have 4 QGIS installations as part of the process. I get the error 'The code execution cannot proceed because OpenCL.dll was not found. Reinstalling the program may fix the problem' for each of the 4 installations - 4 error windows. – IanGS Sep 28 '19 at 8:18
  • Tried to uninstall (not reinstall) all QGIS versions and I received the same error messages. They seem to be NOT uninstalled. – IanGS Sep 28 '19 at 9:37
  • How can you have errors after uninstalling qgis? And what do you mean with having 4 Installations? Which Installer do you use? Where has QGIS been installed? There should be a directory: C:\OSGeo4W or OSGeo4w64. Inside is a folder named bin and it should contain opencl.dll. This will be copied to the Windows system directory when installing qgis. I guess your error with qgis-common.bat rised during the installation? I think you should investigate, why this happens. The bat file is located under osgeo4w\etc\postinstall and can run it from a OSGeo Command Shell. – Andreas Müller Sep 28 '19 at 13:30

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