# Reading OPC tags error: \[Scanclass 'Default\[default\]'\] Will not attempt to resubscribe nodes, the subscription is bad

**URL:** <https://forum.inductiveautomation.com/t/reading-opc-tags-error-scanclass-default-default-will-not-attempt-to-resubscribe-nodes-the-subscription-is-bad/20853>\
**Category:** Ignition\
**Created:** [November 14, 2018, 3:50pm UTC](https://forum.inductiveautomation.com/t/reading-opc-tags-error-scanclass-default-default-will-not-attempt-to-resubscribe-nodes-the-subscription-is-bad/20853 "2018-11-14T15:50:06Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![jose.pablo.arguello](https://avatars.discourse-cdn.com/v4/letter/j/57b2e6/32.png) [@jose.pablo.arguello](https://forum.inductiveautomation.com/u/jose.pablo.arguello)\
**Post date:** [November 14, 2018, 3:50pm UTC](https://forum.inductiveautomation.com/t/reading-opc-tags-error-scanclass-default-default-will-not-attempt-to-resubscribe-nodes-the-subscription-is-bad/20853/1 "2018-11-14T15:50:06Z")

</div>

Hello, I have Ignition Version: 7.9.9 running on trial mode to test a OPC DA Server connection with a ABB Freelance OPC server. It is connected alright but the tags added are with a null value and unknown quality. From the debug logs all I get is:[Scanclass ‘Default[default]’] Will not attempt to resubscribe nodes, the subscription is bad.

How can I solve it? Thanks.

---

<div class="post-metadata">

**Author:** ![alainia.spencer](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@alainia.spencer](https://forum.inductiveautomation.com/u/alainia.spencer)\
**Post date:** [December 12, 2019, 4:30pm UTC](https://forum.inductiveautomation.com/t/reading-opc-tags-error-scanclass-default-default-will-not-attempt-to-resubscribe-nodes-the-subscription-is-bad/20853/2 "2019-12-12T16:30:15Z")

</div>

Did you ever figure this out?

---

<div class="post-metadata">

**Author:** ![jose.pablo.arguello](https://avatars.discourse-cdn.com/v4/letter/j/57b2e6/32.png) [@jose.pablo.arguello](https://forum.inductiveautomation.com/u/jose.pablo.arguello)\
**Post date:** [January 6, 2020, 2:16pm UTC](https://forum.inductiveautomation.com/t/reading-opc-tags-error-scanclass-default-default-will-not-attempt-to-resubscribe-nodes-the-subscription-is-bad/20853/3 "2020-01-06T14:16:42Z")

</div>

From what i can recall, it was an issue on the OPC server. I remember I had to reinstall the OPC and the Freelance and try all over again and then the issue did not present again.