Error Downloading Invalid Asset

[FelipeMa7]

I'm new to AEM. I need to replace some assets that AEM considers "Invalid" due to their large width or size.

However, when I try to download this "invalid asset," I receive a 404 error.

Has anyone encountered this error before?

[BrianKasingli]

404 error on your screen, when trying to download it is often a sign of a permissions issue, not just the invalid status.

Most likely, the user or group you're assigned to doesn’t have the correct ACLs (Access Control Lists) to access or download that particular asset. Even though the asset appears in the interface, AEM enforces read/download permissions separately—especially for unprocessed or restricted assets.

You’ll want to check with your AEM admin to confirm:

• You have read and download permissions (jcr:read, rep:write, etc.) on the asset’s path

• You’re not being restricted by any deny rules higher up in the DAM folder hierarchy

Once those permissions are fixed, the download should work.

Given that you are a beginner, you should take a look at these articles:

1. Adobe Official Article: https://experienceleague.adobe.com/en/docs/experience-manager-screens/user-guide/administering/setti... 
2. Youtube: https://www.youtube.com/watch?v=xH5OllHncZA 
3. https://techrevel.blog/2024/03/04/aem-user-permissions-tips-for-effortless-control/ 
4. https://medium.com/@mayursatav/aem-users-groups-acl-impersonation-e18566cce1aa 

[ShivamKumar · Accepted solution]

Hi @FelipeMa7 ,

Why You Get a 404 for an "Invalid Asset":-

1. Asset Processing Aborted - When you upload an asset that exceeds AEM’s allowed width (or size), the DAM Update Asset workflow halts processing. AEM flags it as invalid and does not store the original binary or create renditions
   .
2. Missing Binary Renditions
   Because no original or preview files exist under:

/content/dam/.../asset-name.jpg/jcr:content/renditions/original

AEM cannot serve the asset, resulting in a 404 Not Found.

You get a 404 because the asset was never stored - AEM rejected it before saving. Either enlarge the OSGi width/size limits and re-upload, or resize the asset locally to fit within the existing configuration.

[kautuk_sahni]

@FelipeMa7 Did you find the suggestions helpful? If you need more information, please let us know. If a response resolved your issue, kindly mark it as correct to help others in the future. Alternatively, if you discovered a solution on your own, we'd appreciate it if you could share it with the community. Thank you!