How can I resolve the error: module "QtCharts" is not installed?

daddyKiko57

I tried to run the following code, but I got the error: module "QtCharts" is not installed.

import QtQuick 2.15
import QtCharts 2.15

Rectangle {
    id: root
    width: 1392 * scaleFactor
    height: 436 * scaleFactor
    color: theme.item.color7

    ChartView {
        title: "Line Chart"
        anchors.fill: parent
        antialiasing: true

        LineSeries {
            name: "Line"
            XYPoint { x: 0; y: 0 }
            XYPoint { x: 1.1; y: 2.1 }
            XYPoint { x: 1.9; y: 3.3 }
            XYPoint { x: 2.1; y: 2.1 }
            XYPoint { x: 2.9; y: 4.9 }
            XYPoint { x: 3.4; y: 3.0 }
            XYPoint { x: 4.1; y: 3.3 }
        }
    }
}

I have confirmed the following:

The Qt Charts module is installed for my current Qt version, and other modules located in the same path are working fine.

enter image description here

I have added QT += charts in my .pro file.

enter image description here

Any help would be greatly appreciated! Thank you. :)

JKSH

@daddyKiko57 As a quick sanity check: Are you able to run the official Qt Charts examples?

If the official examples work but your app doesn't, set the environment variables QML_IMPORT_TRACE=1 and QT_DEBUG_PLUGINS=1 before running your app from Qt Creator. What do you see in the Application Output pane?

SGaist

Hi and welcome to devnet,

Did you re-run qmake after adding the charts module ?

daddyKiko57

@SGaist
Hi，thank you so much for your warm reply!

Yes, I did re-run qmake after -- I also double-checked that the .exe file has the latest modified timestamp.
Additionally, I tried uninstalling and reinstalling the Qt Charts module.
Unfortunately, the issue still persists.

If you have any other ideas, I'd be truly grateful -- and honestly, your reply already made my day. :-)

Bandler

Sometimes it might help to delete the whole build directory. I had times this was resolving issues with QML builds.

JKSH

@daddyKiko57 As a quick sanity check: Are you able to run the official Qt Charts examples?

If the official examples work but your app doesn't, set the environment variables QML_IMPORT_TRACE=1 and QT_DEBUG_PLUGINS=1 before running your app from Qt Creator. What do you see in the Application Output pane?

daddyKiko57

@JKSH
Thank a lot for your concise reply—it really solved my problem! ：）

Although I didn’t set the QML_IMPORT_PATH, I had bundled all dependencies into the .../target/debug folder for debugging convenience. Qt then loaded QML modules from there by default, but since QtCharts was missing, a runtime error occurred.

After deleting everything except third-party libraries in the folder and rebuilding, Qt now loads modules from the installation directory, and everything works fine.

Your explanation gave me a much clearer picture of how Qt handles QML module loading, especially the fallback behavior—I am truly grateful!

daddyKiko57

This post is deleted!