[RegCNET] problem with regcm.x

[elham M]

hi user
i face two problem in regcm run

1 )sometimes in regcm.x run step ,it is stop and there
is a messegae

maximum time =   91.000 days.
 time step =  180.00 seconds
 dx =  60000. meters
 grid points (x,y) = ( 51, 34)
 number of levels = 18
 constant hor. diff. coef. =  0.30000E+05 m*m/s
 maximum  hor. diff. coef. =  0.31250E+06 m*m/s
PGFIO-F-209/OPEN/unit=101/'OLD' specified for file
which does not exist.
 File name = fort.101
 In source file init.f, at line number 89

2) SIGMAto.f program in which step must be run?

please guide me.
elham