Here's an old forum message that I found on this issue – I haven't had a chance to verify it yet, but...
During our GIS class session (Tues, 10 Feb), a couple of folks encountered an error message when they went to save their My World files.
I don't have an explanation, but I do have a solution:
- Save the file again, but this time DON'T use the "Compress Into a Single File" option. This will tell it to instead save the project as a folder full of files. You'll still get an error message, but you will also get your folder of data -- in other words, your work is still there, it's just packaged differently.
- Now bring in the data from the folder. (You may want to clear out the old data from your GIS, removing each layer one by one.) To bring in data from the folder, select "Add Layer" and navigate to wherever you saved your folder. Inside that folder, go to the "data" folder and look around for the .shp file. As you add the shp files, the data associated with it (from the dbf and shx, for example) will come with it.
- Once you've re-loaded your layer(s), you should now be able to save the project as a single, compressed file.
Again, I don' t know why this happens, but this workaround seems to do the trick. Let me know what obstacles you run into and I'll see if I can work them out.