Hi, thank you for great plugin. It saved my time. When using the plugin at first, I had failed uploading but there were no detailed error message shown. I modified the code to display the reason of failure, then I could take work-around (split csv files into smaller, to avoid upload_max_filesize limit). So, I want to share my patch. Hope if the author also finds and takes it in. csv_importer.php l
![Suggestion when csv upload fails](https://cdn-ak-scissors.b.st-hatena.com/image/square/ed4d0a493ce504f1173fe010d5b74ef7a8be02dc/height=288;version=1;width=512/https%3A%2F%2Fs.w.org%2Fimages%2Fhome%2Fwordpress-default-ogimage.png)