Not sure what happened but my taskcoach file got corrupted for some reason. Never had this issue before and have task coach for more than a year.
Appreciate if there are guidelines on how to fix an error like this.
All the error tells is that the file isn't valid XML (at least not at the end, there is some valid data first); it's impossible to tell exactly what can be done. If it doesn't contain sensitive information you can send it to me privately so I can take a look (fraca7 AT free DOT fr).
As for the cause, the only one I can think of would be a hard reboot, power outage or such. The task file can't get corrupted at the application level, even if the disk is full.