Cannot read property 'updateMaterials' of null in viewer3D.js

Question

I'm getting Type Error when trying to destroy the viewer in Angular2.

for that I tried this code,

ngOnDestroy() {
        if (this.viewer && this.viewer.running) {
            this.viewer.tearDown();
            this.viewer.finish();
            this.viewer = null;
        }
    }

But getting Error like below:

TypeError: Cannot read property 'updateMaterials' of null
    at tick (viewer3D.js:27154)
    at animloop (viewer3D.js:27631)
    at ZoneDelegate.invokeTask (zone.js:356)
    at Object.onInvokeTask (node_modules/@angular/core//bundles/core.umd.js:9091)
    at ZoneDelegate.invokeTask (zone.js:355)
    at Zone.runTask (zone.js:256)
    at ZoneTask.invoke (zone.js:423)

How can I fix this issue using Angular2?

What is this.viewer ?

Arash
– Arash

2018-07-17 10:18:18 +00:00
Commented Jul 17, 2018 at 10:18 — Arash
– Arash, Commented Jul 17, 2018 at 10:18
"this.viewer" is the instance of forge viewer.

Ruhama David
– Ruhama David

2018-07-18 05:25:27 +00:00
Commented Jul 18, 2018 at 5:25 — Ruhama David
– Ruhama David, Commented Jul 18, 2018 at 5:25

Augusto Goncalves · Accepted Answer · 2018-07-17 13:48:26Z

0

Please check this answer. Additionally, you may also need to .impl.unloadCurrentModel()

answered Jul 17, 2018 at 13:48

Augusto Goncalves

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1 Comment

Augusto Goncalves Over a year ago

@RuhamaDavid I tried your original code, and works fine. I'm guessing your Angular code still trying to access the Viewer and causing this error (updateMaterials occurs with the render). The other answer suggests to keep the Viewer running when you navigate between states/pages on your SPA.

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