# Setting tags as writable

**URL:** <https://forum.inductiveautomation.com/t/setting-tags-as-writable/6838>\
**Category:** Module Development\
**Created:** [July 9, 2013, 7:35pm UTC](https://forum.inductiveautomation.com/t/setting-tags-as-writable/6838 "2013-07-09T19:35:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![idelamer](https://avatars.discourse-cdn.com/v4/letter/i/e5b9ba/32.png) [@idelamer](https://forum.inductiveautomation.com/u/idelamer)\
**Post date:** [July 9, 2013, 7:35pm UTC](https://forum.inductiveautomation.com/t/setting-tags-as-writable/6838/1 "2013-07-09T19:35:20Z")

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Related to the other recent posts, I’m trying to use the existing Tag providers and:

- update the Tag value through updateCurrentValue()
- subscribe to Value change events in order to capture write events and send them to a remote device

When using an internal provider, I can change the Tag value e.g. in Designer and this trigger a change event.

When using a Database Driving Provider, when I attempt to change the value I get a null pointer exception.

Any hints on how to make these tags writable?

Cheers  
Ivan