Error compiling pike script

/home/hww3/html/dist/Fins/FinsWin/lib/Fins.pmod/Model.pmod/DateField.pike:8	Error: Cannot inherit program in pass 2 which is not fully compiled yet.
/home/hww3/html/dist/Fins/FinsWin/lib/Fins.pmod/Model.pmod/DateField.pike:8	Error: (You probably have a cyclic symbol dependency that the compiler cannot handle.)