# General Handling
**URL:** https://discourse.nodered.org/t/general-handling/63214
**Category:** General
**Created:** [29 May 2022 13:58 UTC](https://discourse.nodered.org/t/general-handling/63214 "2022-05-29T13:58:41Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@alexander77](https://discourse.nodered.org/u/alexander77)
#### Post date: [29 May 2022 13:58 UTC](https://discourse.nodered.org/t/general-handling/63214/1 "2022-05-29T13:58:41Z")
Hi,
i've just finished a bigger project using 4 PTZ Cameras. Project works. Just 2 questions about handling.
1. my project had 4 cameras including, but only 1 was available. The other 3 PTZ nodes steadily send error-messages which made atherwise reading messages difficult. Is there a way to suppress messages from these nodes?
2. After finishing the work i deleted the nodes, deleted flows and ui-entries. But after addind new nodes for a different project and deploying them nodered found some more unused entries. And the PTZ nodes, also deleted, still produces error messages. Is there a possibility to make 'Tabula rasa', a clean enviroment ? Or can this be added to a next release?
All the best,
Alexander
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [29 May 2022 14:01 UTC](https://discourse.nodered.org/t/general-handling/63214/2 "2022-05-29T14:01:16Z")
> [@alexander77](#):
>
> Is there a way to suppress messages from these nodes?
If they are errors (not warnings) and the node was written correctly, you can suppress these using a catch node pointed at them.
> [@alexander77](#):
>
> Is there a possibility to make 'Tabula rasa', a clean enviroment ?
several ways...
- Use projects mode (a setting in settings.js)
- Delete `flows.json`
- Startup node-red with `-u` parameters (e.g. `node-red -u /my/new/project/`)
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [29 May 2022 14:23 UTC](https://discourse.nodered.org/t/general-handling/63214/3 "2022-05-29T14:23:38Z")
You could also just delete your userDir folder completely, restarting node-red will recreate a blank environment for you.
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### Author:  [@alexander77](https://discourse.nodered.org/u/alexander77)
#### Post date: [29 May 2022 15:38 UTC](https://discourse.nodered.org/t/general-handling/63214/4 "2022-05-29T15:38:08Z")
Thank you for your replies, i will try that tomorrow.
@Steve: When reading your reply i'm not shure wether it was an error or a warning - simply the camera was not present.
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [29 May 2022 15:56 UTC](https://discourse.nodered.org/t/general-handling/63214/5 "2022-05-29T15:56:48Z")
> [@alexander77](#):
>
> @Steve: When reading your reply i'm not shure wether it was an error or a warning - simply the camera was not present.
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### Author:  [@alexander77](https://discourse.nodered.org/u/alexander77)
#### Post date: [29 May 2022 16:27 UTC](https://discourse.nodered.org/t/general-handling/63214/6 "2022-05-29T16:27:11Z")
Well, it's an error, but catch does not help.
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [29 May 2022 22:23 UTC](https://discourse.nodered.org/t/general-handling/63214/7 "2022-05-29T22:23:51Z")
> [@alexander77](#):
>
> Well, it's an error, but catch does not help
In which case, you should contact the author and ask that they catch errors and relay them to node-red using the mechanism `node.error(error, msg)` or introduce an option to either send errors out of a 2nd output or to suppress them.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [28 July 2022 22:23 UTC](https://discourse.nodered.org/t/general-handling/63214/8 "2022-07-28T22:23:52Z")
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