# Flows stopped due to missing node types - spontaneously

**URL:** <https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-spontaneously/31365>\
**Category:** General\
**Created:** [10 August 2020 06:55 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-spontaneously/31365 "2020-08-10T06:55:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [10 August 2020 06:55 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-spontaneously/31365/1 "2020-08-10T06:55:12Z")

</div>

While working on some flows, deploying, editing, deploying etc.

When I deploy sometimes, I get "no response from server" - where node-red restarts and this popup suddenly shows up: "Flows stopped due to missing node types" - for openzwave-am and ttn app, these nodes have giving me problems since the last update of node-red (don't think it is related).

The last message is:

```auto
- /home/administrator/.node-red/node_modules/node-red-contrib-ttn/ttn-app/ttn-app.js
- /usr/lib/node_modules/node-red/node_modules/@node-red/registry/lib/loader.js
- /usr/lib/node_modules/node-red/node_modules/@node-red/registry/lib/index.js
- /usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/nodes/index.js
- /usr/lib/node_modules/node-red/node_modules/@node-red/runtime/lib/index.js
- /usr/lib/node_modules/node-red/lib/red.js
- /usr/lib/node_modules/node-red/red.js
10 Aug 08:48:18 - [warn] [node-red-contrib-openzwave-am/zwave] Error: The module '/home/administrator/.node-red/node_modules/openzwave-shared/build/Release/openzwave_shared.node'
was compiled against a different Node.js version using
NODE_MODULE_VERSION 64. This version of Node.js requires
NODE_MODULE_VERSION 72. Please try re-compiling or re-installing
the module (for instance, using `npm rebuild` or `npm install`). (line:43)

```

I go to both nodes and do rebuild followed by install, restart node-red and it works again - for a while.  
How come that it suddenly evaluates these nodes and fails ?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [9 October 2020 06:55 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-spontaneously/31365/2 "2020-10-09T06:55:17Z")

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