# Error Writing to Tag.value:Bad

**URL:** <https://forum.inductiveautomation.com/t/error-writing-to-tag-value-bad/91471>\
**Category:** Ignition\
**Tags:** ignition81, perspective\
**Created:** [June 6, 2024, 12:50pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-tag-value-bad/91471 "2024-06-06T12:50:23Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\
**Post date:** [June 6, 2024, 1:15pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-tag-value-bad/91471/5 "2024-06-06T13:15:17Z")

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From looking around the Forum, it seems that this error means that the tag in the device can not be written.

Which appears to have two causes:

1. The address doesn't exist (typo or other entry error).
2. The device is busy doing something else and has refused the write. (Specifically there have been issues seen if this is tried while logic is being updated).

> [@Bad("Bad\_NotWritable: The access level does not allow writing to the Node.")](https://forum.inductiveautomation.com/t/bad-bad-notwritable-the-access-level-does-not-allow-writing-to-the-node/53813/3):
>
> FWIW @Kevin.Herron I’ve been seeing this specifically on 8.1.11 if I’m doing a fairly large logic change and a Logix PLC (not SLC) and then try and write to a tag while the logic changes are currently being accepted. It usually clears up a couple of seconds after the logic has been accepted into the PLC. Same error message.

On another note, I'm going to be honest, I didn't think it was possible to have a tag name that began with a number, even if it is, I would strongly suggest that you don't do that, it will eventually bite you.

If you're running this from a Gateway Script, then `print` doesn't print where you might think.

> [@Event Configuration Print Out to debug](https://forum.inductiveautomation.com/t/event-configuration-print-out-to-debug/60091/5):
>
> It’s complicated slight_smile Starting from most local to least… In the script console, print will log directly to the output buffer on the right hand side. system.util.getLogger() will log to the named ‘Output Console’ Designer window. Bonus: A script invoked from here using system.util.invokeAsync will print to the regular output console, not the buffer on the right hand side. Anywhere else in the designer (except Perspective), print and system.util.getLogger will log to the ‘Out…

For what it's worth, I would write your script like this:

```python
path = ["[default]Ovens/Oven26/DEKEMA_Furnace_Status/OPC_UA_DATA_VisuStatus_Data"]
status = system.tag.readBlocking(path)[0].value
bitFlipper = ["[default]Ovens/Oven26/IDLE PLC/UnitId 26/26_013-26_013/26_013"]
system.tag.writeBlocking(bitFlipper, [if status == "WAIT"])

```

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