Warning from Total Import PRO that there is no or empty file

The feed I try to upload in Step 1 of the import proces in "system" at contrary is 29,0 Mo.

There is a php error that says:
"Notice: Undefined index: source in C:\wamp\www\pulpkiosk\admin\model\tool\total_import.php on line 319Notice: Undefined index: source in C:\wamp\www\pulpkiosk\admin\model\tool\total_import.php on line 325"

And I get thus a red warning in the admin that there is no or empty file (title of this post).

Now it happens that I see more php errors while I work in my admin that disappear after I completed a task. I tell you this because I read from an other user that the exention works great. But me I'm blocked.

The opencart version is 1.5.1.3

I'm testing out in wampserver 2 in localhost, so I can't give a link. I already noticed wampserver gives very easily error messages while in an online server everything runs normal. But I don't know if I would already try in my online store at this point of the proces.

Hey, this error most commonly occurs when an upload file is to large for the server settings (the file upload is denied), if you are still experiencing issues or have any problems never hesitate to contact us directly.