Instead I get a soil error that says :

The initialized C:N ratio of the soil organic

matter (humus) in layer 8 is unlikely: 9.0

A C:N ratio of 10.0 will be used to calculate initial soil organic N.

Please check your SOIL.SOL file.

and there is frost damage to soybean crop and this message is displayed in warning output

" FREEZE YEAR DOY = 1990 97

Freeze occurred at 27 days after planting.

CRPGRO YEAR DOY = 1990 97

Plant died due to extreme stress at 27 days after planting.

(DAY : 1990 97; TURFAC : 1.00; AGEFAC : 1.00 ) "