Cannot upload file sets to Custom Translator

Question

Cannot upload file sets to Custom Translator

J-P 20

I ran into a problem when trying to upload file sets to train the Custom Translator. Only .align files seem to be going through and uploading correctly; any other file type gets stuck somewhere and ends up with the UserFilesUploaded status. User's image

Jerald Felix 9,830 Reputation points

2025-11-20T11:43:35.14+00:00
Hello, J-

Thanks for raising this question in Q&A forum.

I understand that you are experiencing issues uploading file sets (Training, Tuning, or Testing) to your Custom Translator workspace.

This error can often occur due to formatting inconsistencies, naming conventions, or temporary browser session states. Please check the following troubleshooting steps:

Check File Constraints:

Format: Ensure your files are in supported formats (.txt, .tmx, .docx, etc.).

Size: Individual files must be under 100 MB. If your dataset is larger, try splitting it into multiple smaller files.

Archives: If you are uploading a .zip archive, ensure the files are at the root of the archive and not inside a subfolder.

Naming Conventions (Parallel Files):

For parallel text files, strict naming is required to map the languages correctly. Ensure your files share a common base name and end with the language code (e.g., training-data.en.txt and training-data.es.txt).

File Encoding:

Ensure all text files are encoded in UTF-8. Files with other encodings (like ANSI or UTF-16) often fail to process correctly during the upload stage.

Browser Session:

Generic upload errors can sometimes be caused by stale browser cache. Try uploading the files using an Incognito/Private window to rule out client-side caching issues.

If the issue persists and you receive a specific error code (like a 400 or 500 series), please share the specific error message for further diagnosis.

If helps, approve the answer.

Best Regards,

Jerald Felix
Aryan Parashar 3,380 Reputation points Microsoft External Staff Moderator

2025-11-25T07:33:20.2+00:00

Hi J,
Let me know if you have further queries.
Please accept the answer posted.

Thank you for reaching out to The Microsoft Q&A Portal.
Aryan Parashar 3,380 Reputation points Microsoft External Staff Moderator

2025-11-28T08:52:46.51+00:00

Hi J,
Let me know if you are still facing issues.
Please accept the answer posted if it worked for you.

Thank you for reaching out to The Microsoft Q&A Portal.

Answer accepted by question author

0 additional answers

Your answer

Jerald Felix 9,830 Reputation points

2025-11-20T11:43:35.14+00:00

Hello, J-

Thanks for raising this question in Q&A forum.

I understand that you are experiencing issues uploading file sets (Training, Tuning, or Testing) to your Custom Translator workspace.

This error can often occur due to formatting inconsistencies, naming conventions, or temporary browser session states. Please check the following troubleshooting steps:

Check File Constraints:

Format: Ensure your files are in supported formats (.txt, .tmx, .docx, etc.).

Size: Individual files must be under 100 MB. If your dataset is larger, try splitting it into multiple smaller files.

Archives: If you are uploading a .zip archive, ensure the files are at the root of the archive and not inside a subfolder.

Naming Conventions (Parallel Files):

For parallel text files, strict naming is required to map the languages correctly. Ensure your files share a common base name and end with the language code (e.g., training-data.en.txt and training-data.es.txt).

File Encoding:

Ensure all text files are encoded in UTF-8. Files with other encodings (like ANSI or UTF-16) often fail to process correctly during the upload stage.

Browser Session:

Generic upload errors can sometimes be caused by stale browser cache. Try uploading the files using an Incognito/Private window to rule out client-side caching issues.

If the issue persists and you receive a specific error code (like a 400 or 500 series), please share the specific error message for further diagnosis.

If helps, approve the answer.

Best Regards,

Jerald Felix
Aryan Parashar 3,380 Reputation points Microsoft External Staff Moderator

2025-11-25T07:33:20.2+00:00

Hi J,
Let me know if you have further queries.
Please accept the answer posted.

Thank you for reaching out to The Microsoft Q&A Portal.
Aryan Parashar 3,380 Reputation points Microsoft External Staff Moderator

2025-11-28T08:52:46.51+00:00

Hi J,
Let me know if you are still facing issues.
Please accept the answer posted if it worked for you.

Thank you for reaching out to The Microsoft Q&A Portal.

Answer 1

Aryan Parashar 3,380 Microsoft External Staff Moderator

Hi J,

I understand the frustration this issue may cause. The error you're encountering is due to a mismatch in the number of lines between your files.

For proper alignment, both files must have strict 1:1 sentence alignment.

Additionally, please ensure the following:

Your text file is UTF-16 or UTF-8 encoded.
The file name does not contain any Japanese characters.

I hope this resolves the issue. Feel free to mark this as the answer if it helps!

Thank you for reaching out to The Microsoft Q&A Portal.

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Cannot upload file sets to Custom Translator

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