May be by this time you might already got some workaound for the problem. If not just check the following comment:
Are you using Harvest Plugin for eclipse?
If yes, Please try adding the project to the workspace and before compiling the project, go to the project folder on file system, search for harvest.sig files and delete them. As a part of checkout process, harvest.sig files gets generated.
This option would be temporary. Once you do any checkout(Get from Repository) harvest.sig files gets generated again.
Also we can try searching for some option to exclude harvest.sig from compiling.
Hope this helps.
Thanks,
Sridhar