It is recommended to use a wired connection for uploading the zips to Catenda.

Many wifi routers do a great job at making sure they receive the right data, but even the best routers can struggle with a weak signal if you are far away from the router.

If your lose connection to the network during your upload you will see a message saying failed to upload! Unable to process file.

Please close the dialoge and retry your zip upload if this is the case.

Catenda detects the encoding of the zip file when it gets extracted so if the zip has special characters in it they will be interpreted properly when extracted. If the special characters were not encoded properly they will not be extractable by Catenda and will end up looking garbled.

Depending on the service you use for creating your zip file your characters may or may not be encoded correctly.

If your special characters are garbled please look in the zip to see if they look right there.

If you think your characters were encoded properly and are not properly being extracted by Catenda we are happy to have a look at your zip file and see if there is anything we can do. In this case please contact support@catenda.com with the details of how you created your zip file.

Different versions of Windows use different zip encodings.

For example the English version uses the encoding standard IBM-437 and the pt-BR version uses IBM-850. If your Windows installation does not encode your zip files properly you might have more luck using a third party service like 7zip or WinRAR to create your zip files with the right encoding.

When a file in the zip file has a potentially harmful filetype they will not be uploaded.
This is what it can look like when you attempt to upload a harmful filetype:

​The following filtypes which can potentially be harmful are not allowed.