@CDQT said in QtWebEngineProcess.exe not found.:
yes. files exists. checked the environment with cmd command "echo %QTWEBENGINEPROCESS_PATH%"
That does not tell us whether a file exists, it just shows the value of an environment variable. Something like dir %QTWEBENGINEPROCESS_PATH% would be better than echo.
The error when you run QtWebEngineProcess from the command line was to be expected, I was just trying to find out whether it would be found and run.
Have you checked whether QTWEBENGINEPROCESS_PATH is recognised/handled in a Qt version as old as 5.9? I don't know. Maybe find what doc page https://doc.qt.io/qt-5/qtwebengine-deploying.html#deploying-qt-webengine-processes read at 5.9? You might also try Googling QtWebEngineProcess.exe not found and look through the various hits to see whether any of them might be applicable to your situation.