Dear Zep,
Since you have last updated BBC, We have experienced trouble with uploading new cartridges.
Whenever we are trying to upload new Cartridge it tells us "Not a valid cart. Please try again."...
Please advice.
Many thx
/DMS

I'm having this error message now, while trying to upload my first cart. Any ideas what can cause this, as it doesn't really suggest anything helpful in the error message...?

In the past we had trouble with carts that are named "funny"
special characters, too long of a name... etc
Also couldn't upload cart, that turned out to be too large, due to imported music. Also the process of posting a cart is a bit confusing, you could be not pressing a button some place. Last time we posted an update was on Sat.

Hope that helps.