BabylonJS/Babylon.js · error

BufferView ${bufferView} not found in BufferManager.

Error message

BufferView ${bufferView} not found in BufferManager.

What it means

_verifyBufferView asserts that a given IBufferView was actually registered in this BufferManager's _bufferViewToData map. If the bufferView is undefined or was never created through this manager, any dependent call (getData, createAccessor, setBufferView, getPropertiesWithBufferView) throws. It catches accessing buffers from a different glTF export/session than the one that produced them.

Source

Thrown at packages/dev/serializers/src/glTF/2.0/bufferManager.ts:184

        const bufferView = this._accessorToBufferView.get(accessor);
        this._verifyBufferView(bufferView);
        return bufferView!;
    }

    public getPropertiesWithBufferView(bufferView: IBufferView): IPropertyWithBufferView[] {
        this._verifyBufferView(bufferView);
        this._bufferViewToProperties.set(bufferView, this._bufferViewToProperties.get(bufferView) ?? []);
        return this._bufferViewToProperties.get(bufferView)!;
    }

    public getData(bufferView: IBufferView): TypedArrayForglTF {
        this._verifyBufferView(bufferView);
        return this._bufferViewToData.get(bufferView)!;
    }

    private _verifyBufferView(bufferView?: IBufferView): void {
        if (bufferView === undefined || !this._bufferViewToData.has(bufferView)) {
            throw new Error(`BufferView ${bufferView} not found in BufferManager.`);
        }
    }
}

View on GitHub (pinned to 0592b347b8)

Solutions

1. Only use IBufferView instances returned by the same BufferManager you are calling into
2. Ensure every bufferView passed to accessors was produced via this manager's buffer-view creation API in the current export session
3. Guard call sites: check the bufferView is defined before passing it, and re-create it if the manager was reset

Example fix

// before
const accessor = managerA.createAccessor(...);
laterData = managerB.getData(accessor.bufferView!); // throws
// after
const accessor = managerA.createAccessor(...);
laterData = managerA.getData(accessor.bufferView!);

if (!bufferView) throw new Error("bufferView is undefined; accessor creation skipped");
// keep a per-manager set of created views:
if (!createdViews.has(bufferView)) throw new Error("bufferView belongs to another BufferManager");

function belongsToManager(bv: IBufferView | undefined, m: BufferManager): bv is IBufferView {
  return bv !== undefined && m.getBufferView(bv) !== undefined;
}

try {
  const data = manager.getData(bufferView);
} catch (e) {
  if (String(e.message).startsWith("BufferView")) {
    logger.error("stale/foreign bufferView; re-creating in current export session", e);
    // recreate via manager's buffer-view API before retrying
  } else throw e;
}

When it happens

Trigger: Calling getData(bufferView) or createAccessor with an IBufferView object obtained from another BufferManager instance, a bufferView captured before its data was written, or passing undefined after a failed/optional creation step.

Common situations: Mixing buffer managers across multiple simultaneous glTF exports; holding bufferView references from a previous export attempt that was reset; a pipeline bug where setBufferView was skipped for one accessor.

Related errors

• Buffer data is not available
• Buffer access is out of range
• ${context}: Uri is missing or the binary glTF is missing its
• ${context}: Uri is missing or the binary glTF is missing its
• ${context}: ${e.message}

AI-assisted analysis of BabylonJS/Babylon.js@0592b347b8 (2026-08-30). Data as JSON: /api/errors/340c4504cc7cd0c4. Report an issue: GitHub.