Question

I have created a Qt application with Mingw. The application runs properly on the development computer after copying the required DLL’s to the directory. However, when deploying on external computers, the application does not run at all.

Update:
In addition, the application uses Sqlite3 via QtSql.

Answer 1

It’s quite likely you’re still missing some dll.

1. Check the Windows event log for any errors after running the application. (Administrative Tools->Event Viewer).
2. Try launching the application from a command prompt window.
3. Try Dependency Walker.

Another thought is some missing configuration file or registry settings.

Double check against the Qt docs for deploying Windows Qt applications.