Carta Plugin - problem uploading images

I’m trying out Omeka (2.4.1), and trying out the Carta plugin (1.2.2) as part of that. I have basic Omeka functionality working, and a simple Carta map on an item as a test. But I’m now trying to upload an image overlay of a historic map to use. I’ve tried a variety of image files, both JPEG and PNG, but everything I’ve tried gives:

Information!
Sorry, your file was not uploaded

Is there a size limit? An image file format that works better than others?

thanks,
gene

Hi -
Sorry I missed your post earlier.
The limit on file upload is set on the server, not in the plugin.
You should contact support at your host (or adjust PHP Max Post Size if self hosting).
Apologies again for the delay.
David