# Help with error detection creation
**URL:** https://discourse.nodered.org/t/help-with-error-detection-creation/37950
**Category:** General
**Created:** [23 December 2020 22:15 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950 "2020-12-23T22:15:19Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [23 December 2020 22:15 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950/1 "2020-12-23T22:15:19Z")
I have a subflow and in there is this bit of code:
```auto
if (ICDID != device)
{
node.warn("Node Configuration not set");
node.error("Node Configuration not set", msg)
// fa-eye-slash
return;
}
```
Which is nice but I now realise I need more information.
It would be nice to know those two things too: `ICDID` and `device`.
Short of sticking them on the end of the `node.error` line: is there another way so I can sort of structure the message?
Then I can see them as discreet parts and not just appended to the message.
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [23 December 2020 23:06 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950/2 "2020-12-23T23:06:56Z")
> [@Trying\_to\_learn](#):
>
> Short of sticking them on the end of the `node.error` line: is there another way so I can sort of structure the message?
> Then I can see them as discreet parts and not just appended to the message.
For the error, you could add them to msg e.g...
```auto
if (ICDID != device)
{
msg.ICDID = ICDID;
msg.device = device;
node.error("Node Configuration not set", msg)
return;
}
```
For node.warn, I do this...
```auto
if (ICDID != device)
{
node.warn({ "message": "Node Configuration not set", ICDID: ICDID, device: device });
return;
}
```
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [24 December 2020 01:15 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950/3 "2020-12-24T01:15:44Z")
> [@Steve-Mcl](#):
>
> For the error, you could add them to msg e.g...
Yes, I think that was what I was saying. (I hope I was)
But that makes it a bit..... yucky with how it is seen.
I was wanting to ... make `msg.ICDID` and the context `device` part of a structure so they could be easily seen.
`node.warn` isn't too good as that would mean opening the edit screen and looking at the nodes.
I have code which shows me the messages (in the edit screen) at a centralised place and it would be nice if I could get it in an easier way to read.
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [24 December 2020 09:59 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950/4 "2020-12-24T09:59:55Z")
For subflows I often have a separate debug or error output on the subflow that I send messages containing this sort of information.
Also remember you can trigger an error from a function node and catch that in a Catch node.
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [24 December 2020 10:01 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950/5 "2020-12-24T10:01:37Z")
I like the first part.
`catch` nodes may be a bit problematic for what I am doing.
But I'll have a dig around the separate output idea.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [22 February 2021 10:01 UTC](https://discourse.nodered.org/t/help-with-error-detection-creation/37950/6 "2021-02-22T10:01:42Z")
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