PastGen,

What worked for me was this.
After I generated the Froogle.txt file, I downloaded it to my PC, and used the upload feature on Google Base to upload the file.

I have 393 items right now, and when I tried it from ZC I didn't see my upload even after 3 or 4 hours, but when I uploaded directly, I began to see the items on the "my items" base list within minutes.

I don't know why that's the case, and this defeats the whole scheduling aspect of automating the feed. But that's what I had to do.

At least you can get your items uploaded and work the rest out later.