# Scan Class between 7.5.6 vs 7.7.6

**URL:** <https://forum.inductiveautomation.com/t/scan-class-between-7-5-6-vs-7-7-6/24449>\
**Category:** Ignition\
**Created:** [April 28, 2019, 7:11pm UTC](https://forum.inductiveautomation.com/t/scan-class-between-7-5-6-vs-7-7-6/24449 "2019-04-28T19:11:26Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![shibubalaji](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/shibubalaji/32/9165_2.png) [@shibubalaji](https://forum.inductiveautomation.com/u/shibubalaji)\
**Post date:** [April 28, 2019, 7:11pm UTC](https://forum.inductiveautomation.com/t/scan-class-between-7-5-6-vs-7-7-6/24449/1 "2019-04-28T19:11:26Z")

</div>

Why scan class is mandatory in Ignition 7.7.6 for any objects, where as this was not mandatory to select in 7.5.6? Or I am doing something wrong for seeing this difference?  
Please see the difference between two versions and is there an easy way to overcome this situation when I am trying to upgrade from 7.5.6 to 7.7.6, instead of editing each tag?

Ignition 7.5.6 (Tag is active, through there was no scan class was selected)

 ![6](https://us1.discourse-cdn.com/inductiveautomation/original/2X/e/eaf5d5a0698d374dc27cfa4b2e59f1381ad10607.jpeg)

Ignition 7.7.6 (Tag is not active, but the moment I select a scan class to default, it will be active)

 ![6](https://us1.discourse-cdn.com/inductiveautomation/original/2X/b/b73ca66053d076eabd798b8e69ebd789b9146d2f.jpeg)

---

<div class="post-metadata">

**Author:** ![witman](https://avatars.discourse-cdn.com/v4/letter/w/d2c977/32.png) [@witman](https://forum.inductiveautomation.com/u/witman)\
**Post date:** [April 29, 2019, 4:39am UTC](https://forum.inductiveautomation.com/t/scan-class-between-7-5-6-vs-7-7-6/24449/2 "2019-04-29T04:39:39Z")

</div>

Those are pretty old versions so I’m not sure if this applies and there may be a better solution… but with that caveat, in more current versions you can select a lot of tags at once and change the scan class on all of them at the same time (screen clipping from v7.9.9). With the tag editor open shift/control-select as many tags as you want, and then change the scan class for all of them at the same time.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/4/49556b6d7dab9c807acb799af4c980725d6574f0.png)

---

<div class="post-metadata">

**Author:** ![shibubalaji](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/shibubalaji/32/9165_2.png) [@shibubalaji](https://forum.inductiveautomation.com/u/shibubalaji)\
**Post date:** [April 29, 2019, 4:45am UTC](https://forum.inductiveautomation.com/t/scan-class-between-7-5-6-vs-7-7-6/24449/3 "2019-04-29T04:45:51Z")

</div>

Witman,  
Thanks for the input. You are right . It is an older version and I am in the process of upgrading to 8. Even in this 7.7, multiple tag editing is possible in a single attempt and i did so. Seems to be working all real time tags, but historical tags still need to get that fixed.

---

<div class="post-metadata">

**Author:** ![witman](https://avatars.discourse-cdn.com/v4/letter/w/d2c977/32.png) [@witman](https://forum.inductiveautomation.com/u/witman)\
**Post date:** [April 29, 2019, 5:01am UTC](https://forum.inductiveautomation.com/t/scan-class-between-7-5-6-vs-7-7-6/24449/4 "2019-04-29T05:01:08Z")

</div>

You’re welcome; glad that worked. You can likely do the same thing (edit multiple tags at once) for the historical scan class setting:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/c/cbb2c56182f2f3251cefdb0ab1d95eb781b48797.png)