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rameshp575128
rameshp575128
July 8, 2026
Question

#FileUploadComponentLimitaions

  • July 8, 2026
  • 5 replies
  • 0 views

Are there any limitations for a!fileupload() component in Appian,
I've tried uploading a zip folder using this, but I am getting the following error : Could not upload file "abc.zip". Reason: Files without extensions are not permitted on this system.
but the file is of .zip extension, I have checked in admin console as well , and zip is enabled in admin console.

5 replies

K
khushim2808
July 8, 2026

a!fileUploadField() does not have any built-in limitation that prevents uploading .zip files. If .zip is allowed in the Admin Console > File Upload settings, the component should accept ZIP files.

The error "Files without extensions are not permitted on this system" typically indicates that Appian is treating the uploaded file (or a file inside the ZIP, if compressed-file inspection is enabled) as having no valid extension. It is not a documented limitation of a!fileUploadField().

Verify the following:

  • The ZIP file is valid and not corrupted.
  • The file actually has a .zip extension (not a hidden or double extension).
  • If "Apply upload settings to contents of compressed files" is enabled, ensure all files inside the ZIP have valid, permitted extensions.
  • Try uploading a newly created ZIP containing only a simple .txt file to determine whether the issue is specific to the archive.

If a simple, valid ZIP also fails despite the correct Admin Console configuration, it is likely an environment-specific issue , try the same on different envionemnent

K
kapils024874
July 9, 2026

Apart from this there are more limitations such as 
1. File Size limitations
2. Appian does not perform antivirus or malware scanning.
3. Users cannot preview files while uploading.
4. Appian does not automatically detect duplicate files.
5. Appian provides a standard upload experience. No Drag-and-Drop Customization.

K
khushim2808
July 9, 2026

Also, there are more limitations for a!fileupload() component in Appian:-

No built-in versioning – Uploading a file with the same name creates a new document; Appian does not automatically maintain file versions.
No upload progress customization – The upload progress indicator is managed by Appian and cannot be customized.
No resumable uploads – If a large file upload is interrupted, users must restart the upload.

K
kapils024874
July 9, 2026

I couldn't agree more. These are few basic capabilities which Appian should have provided

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