Thanks Nigel for the access!

I've found the reason, and i'm working on it to add a fix!

If it's possible to let me the access, until i've found a way to make function working ?

In fact, the reason is simple : the folders for thumbs aren't created during installation.

So, i will add control about that, and try to see why? (maybe because of a windows NT server ?)

I hope to find the solution tomorrow!

I think now it's okay!

The problem came from your images path set as different, and that there was no images folder at the root of your website. (this error can only happen in iCagenda 3.X, so no needs of test on 2.1.14... Therefore, it's better to be in the last version, as i'm adding week after week better coding, new features, more enhancements!)

There's was an other issue due to windows server (in local on your HDD ?) and i've solved this one too!
I will try in an other side, to add a mime-type checking to prevent error when a picture file is corrupted, or not well named (extension not the same as the mime-type)

Thanks for this access, i think now i've been able to solve all this potential issues!