# Can't write to array value

**URL:** <https://forum.inductiveautomation.com/t/cant-write-to-array-value/43704>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [February 22, 2021, 11:24pm UTC](https://forum.inductiveautomation.com/t/cant-write-to-array-value/43704 "2021-02-22T23:24:57Z")\
**Posts on this page:** 1\
**Showing post:** 8

<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [February 22, 2021, 11:46pm UTC](https://forum.inductiveautomation.com/t/cant-write-to-array-value/43704/8 "2021-02-22T23:46:39Z")

</div>

```python
v = system.tag.readBlocking(["Int32Array"])

av = v[0].value

print av

av[0] = av[0] + 1

print av

system.tag.writeBlocking(["Int32Array"], [av])

```

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