Error message M999

I am running an XP laptop and get the following error after the printer as printed a few layers. I am using Solidoodle 2 3D printer.

"Printer stopped due to errors. Fix error and use M999 to restart (Temperature reset. Set it before restarting)"

When I load repetier host on another laptop with XP and run the 3D printer it works perfectly with no error messages.

Any suggestions.