# \[Bug Report\] Model Evaluation Fails Due to Preprocessing Resize

**URL:** <https://discuss.roboflow.com/t/bug-report-model-evaluation-fails-due-to-preprocessing-resize/11239>\
**Category:** 🤝  Community Help\
**Created:** [September 23, 2025, 7:51pm UTC](https://discuss.roboflow.com/t/bug-report-model-evaluation-fails-due-to-preprocessing-resize/11239 "2025-09-23T19:51:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![SuperHarv](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/superharv/32/8387_2.png) [@SuperHarv](https://discuss.roboflow.com/u/SuperHarv)\
**Post date:** [September 23, 2025, 7:51pm UTC](https://discuss.roboflow.com/t/bug-report-model-evaluation-fails-due-to-preprocessing-resize/11239/1 "2025-09-23T19:51:11Z")

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### **Environment**

- Plan: **Basic Plan**

- Workflow: Using preprocessing (resize to 2048×2048), then training

**Issue Description**  
I reported this bug through the _Report a Bug_ option in the Roboflow UI yesterday, but I cannot see the ticket status or receive any email/notification updates.  
The actual issue I encountered is: after uploading tiled images (2048×2048) and applying preprocessing resize, even the model training was able to complete, HOWEVER the model evaluation fails with the following error:

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/2X/f/faa2264048a40219a0e3ec86b863e2df055a4028.png)

There is no detailed log about the cause, which makes it difficult to debug.

**Steps to Reproduce**

1. Upload dataset with tiles (2048×2048 each).

2. In preprocessing, select “Resize to 2048×2048.”

3. Train a model.

4. During evaluation, the error occurs (no evaluation results).

**Expected Behavior**  
The evaluation should complete successfully, or at least provide a clear error message/log.

**Notes**

- The dataset was already tiled before upload.

- I suspect Roboflow may be by default resizing to 640×640, which could conflict with my preprocessing setup.

- If I select “Resize to 1024×1024”, everything just fine.

Could you please check this issue and confirm whether it is a known resource limitation by roboflow or a bug?

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**Author:** ![system](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/1X/bb6edbfa56d0cf2ee603f061e9e09103502cc8cc.png) [@system](https://discuss.roboflow.com/u/system)\
**Post date:** [October 14, 2025, 7:52pm UTC](https://discuss.roboflow.com/t/bug-report-model-evaluation-fails-due-to-preprocessing-resize/11239/2 "2025-10-14T19:52:05Z")

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Closed on October 14, 2025, 7:52pm UTC

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