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Old .ggb files no longer open. Here is an example. Anyone know what to do?
The same question 
Old .ggb files no longer open. Here is an example. Anyone know what to do?
Try this - file was corrupted (slightly)
Thanks!
Unfortunately, I don't think this is specific to just this file. All (or at least many) of my .ggb files from 2017 and earlier will not open. Is there a way for an amateur like myself to address the problem?
Please post a few more
Well, it's not all or even most of my old files that won't open, but it's a lot of them. Here are the ones from my website that were not applets. (The ones that were applets I was able to rescue after I got some help.)
They do all seem to have the same problem, strange!
You need to remove this line from geogebra.xml (once you've unzipped the .ggb file)
Wow, thanks! I didn't know .ggb files could be unzipped.
How do I avoid this issue in the future?
Make backups? They seem to have been saved from a variety of different GeoGebra versions so the most likely explanation is that something has done some sort of strange "search and replace" on them, maybe on 27th Aug 2017
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