Home Reconciliation Why did my upload fail and how do I fix 'Upload failed' errors?

Why did my upload fail and how do I fix 'Upload failed' errors?

Last updated on Aug 27, 2026

Short Answer: An 'Upload failed' message means the system couldn’t process the file; common fixes are to re-export or reformat the file, check file size/encoding, and re-upload.

PreRequisites

  1. You attempted an upload and saw an 'Upload failed' or similar error modal

Steps

  1. Read the exact message in the 'Upload failed' modal for any specific cause or hint.
    You understand if the failure is format, size, or content related.

  2. If the file is exported from a bank or another system, re-export it, choosing a standard format and including headers.
    A fresh clean file that often resolves format issues.

  3. Open the file in Excel/text editor to verify there are no password protections, empty header rows, or unusual delimiters; save again as CSV or XLSX if needed.
    File is readable and uses standard delimiters/encoding.

  4. Try uploading a small sample first 50 rows to confirm format is accepted before uploading the full file.
    Small sample uploads successfully, confirming acceptable format.

  5. If issues persist, capture the error message and contact support with the file for assistance.
    Support can reproduce and advise on the required file format.

Troubleshooting

  1. Modal displays 'Upload failed' without detail.
    LikelyCause: Generic processing error, possibly due to corrupt file or unsupported encoding.
    Action: Open the file in a text editor, save with UTF-8 encoding, remove unusual characters, then retry upload.

  2. Upload fails only for very large files.
    LikelyCause: Server or browser timeouts / size limits.
    Action: Split the export into smaller files and upload them separately, or contact support to confirm file size limits.

  3. Mapping step fails after upload.
    LikelyCause: Required columns are missing or column headers are malformed.
    Action: Edit the file to include clear header names, save, and re-upload so you can map correctly.

Note: The Import modal and 'Upload failed' modal are the key places to read exact error details — copy the error text when contacting support.