The stadiums are the most heaviest files, so if u have more than 500 faces, and importes some stadiums, maybe the default zdata it's full, the zdatas has certainly capacity, after being importing for a while, comes to full capacity and start giving error messages, so it's needed to change the Nº of zdata that cm10 imports by default.
If u don't have a backup, you'll need to reinstall, delete the fifa10 folder and install again, expand database, clean fat and time to time, make a backup of zdatas 51 and 52 and when that kind of error jumps, replace those files and start importing on other zdata (x ex: zdata 69). The zdata default for cm10 can be changed in options, before loading the folder fifa10.