# Troubleshooting dbt Model Failures: Need Help with Incremental Model Logic !!

**URL:** <https://discourse.getdbt.com/t/troubleshooting-dbt-model-failures-need-help-with-incremental-model-logic/17795>\
**Category:** Help\
**Created:** [January 21, 2025, 8:38am UTC](https://discourse.getdbt.com/t/troubleshooting-dbt-model-failures-need-help-with-incremental-model-logic/17795 "2025-01-21T08:38:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![salass00marcelo](https://sea2.discourse-cdn.com/flex020/user_avatar/discourse.getdbt.com/salass00marcelo/32/5113_2.png) [@salass00marcelo](https://discourse.getdbt.com/u/salass00marcelo)\
**Post date:** [January 21, 2025, 8:38am UTC](https://discourse.getdbt.com/t/troubleshooting-dbt-model-failures-need-help-with-incremental-model-logic/17795/1 "2025-01-21T08:38:28Z")

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Hi everyone,

I am encountering an issue with one of my dbt models and I could use some guidance. I have set up an incremental model., but it fails to run successfully on subsequent runs. Initially…, the model works fine, but when I try to run it again with new data, dbt throws an error.

The model uses the `is_incremental()` function to only process new data.  
I have defined a unique key and a filter for new data based on a timestamp field.  
The error message suggests something related to how the incremental logic is being applied but I am not sure what part is breaking.

Has anyone else faced similar issues when using incremental models: ?? What’s the best way to troubleshoot this: ?? I have already checked my SQL and configuration but any additional tips or debugging strategies would be appreciated. I have also read this thread [https://discourse.getdbt.com/t/incremental-load-logic-failed-in-dbt-for-initial-load-](https://discourse.getdbt.com/t/incremental-load-logic-failed-in-dbt-for-initial-load/17026)[devops-engineer](https://www.igmguru.com/cloud-computing/aws-devops-training) but couldn’t get any helpful insights.

Thanks in advance for your help !!

With Regards,  
Marcelo Salas

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**Author:** ![marcelo](https://sea2.discourse-cdn.com/flex020/user_avatar/discourse.getdbt.com/marcelo/32/6126_2.png) [@marcelo](https://discourse.getdbt.com/u/marcelo)\
**Post date:** [January 21, 2025, 12:02pm UTC](https://discourse.getdbt.com/t/troubleshooting-dbt-model-failures-need-help-with-incremental-model-logic/17795/2 "2025-01-21T12:02:43Z")

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Hi Marcelo!

Could you please share the error message and at least the structure of your model configuration?