Hello,
I tried to run RegCM3 in the nested mode. I gave the first run from 1 May to  31 May and restarted the model for June July August September. Then again with the nest option I run the model for May with more resolution. Till this it does work. When I restart the model for 1 June, it shows the error message from ICBC onwards! The error message is as follows.

[lorna@thusharam ICBC]$ ./icbc.x
rm -f *.o SST SST_FVGCM SST_EH5OM AEROSOL ICBC
ifort -tpp7 -O3 -cm -w -w90 -w95 -convert little_endian -c  SST_1DEG.f
ifort -tpp7 -O3 -cm -w -w90 -w95 -convert little_endian -o SST SST_1DEG.o -L../../Commons/env/liblinux/ -lnetcdf -Vaxlib
 sst.wkmean.1981-1989.nc is not available under ../DATA/SST/
  2002060100  2002071418    20020526    20020721           9
  2002052600  2002052600        1075
 XLON,XLAT,SST=   76.05035       15.15308       30.23356
 WRITING OUT MM4 SST DATA:           5        2002    20020526
  2002060200  2002052600        1076
 XLON,XLAT,SST=   76.05035       15.15308       29.92600
 WRITING OUT MM4 SST DATA:           6        2002    20020602
  2002060900  2002052600        1077
 XLON,XLAT,SST=   76.05035       15.15308       29.95514
 WRITING OUT MM4 SST DATA:           6        2002    20020609
  2002061600  2002052600        1078
 XLON,XLAT,SST=   76.05035       15.15308       29.36679
 WRITING OUT MM4 SST DATA:           6        2002    20020616
  2002062300  2002052600        1079
 XLON,XLAT,SST=   76.05035       15.15308       28.83077
 WRITING OUT MM4 SST DATA:           6        2002    20020623
  2002063000  2002052600        1080
 XLON,XLAT,SST=   76.05035       15.15308       28.63894
 WRITING OUT MM4 SST DATA:           6        2002    20020630
  2002070700  2002052600        1081
 XLON,XLAT,SST=   76.05035       15.15308       29.09768
 WRITING OUT MM4 SST DATA:           7        2002    20020707
  2002071400  2002052600        1082
 XLON,XLAT,SST=   76.05035       15.15308       28.71537
 WRITING OUT MM4 SST DATA:           7        2002    20020714
  2002072100  2002052600        1083
 XLON,XLAT,SST=   76.05035       15.15308       28.34090
 WRITING OUT MM4 SST DATA:           7        2002    20020721
99999
ifort -tpp7 -O3 -cm -w -w90 -w95 -convert little_endian -c  ICBC.f
ifort -tpp7 -O3 -cm -w -w90 -w95 -convert little_endian -o ICBC ICBC.o -L../../Commons/env/liblinux/ -lnetcdf -Vaxlib
 NREC =       289276
 NSTART,NNNEND:        79501       79676
 IDATE1,IDATE2:   2002060100  2002071418
  
  
 **************************************************
 FILE ALREADY EXISTS:  ../../Input/ICBC2002060100
 Do you want to overwrite the existing file? [y/n/q]
y
 READ IN fields at DATE:  2002060100  from ATM.2002052000
 GLONMN,ALONMN,ALONMX,GLONMX =
   73.34171       76.05035       77.03957       78.19787
 GLATMN,ALATMN,ALATMX,GLATMX =
   16.95821       15.15308       15.93283       20.53415
forrtl: severe (36): attempt to access non-existent record, unit 55, file /home/lorna/UTIL/RegCM/PreProc/ICBC/../DATA/RegCM/ATM.2002052000
Image              PC        Routine            Line        Source
ICBC               080DB81E  Unknown               Unknown  Unknown
ICBC               080D9EF1  Unknown               Unknown  Unknown
ICBC               080B325D  Unknown               Unknown  Unknown
ICBC               08088EF2  Unknown               Unknown  Unknown
ICBC               08088C22  Unknown               Unknown  Unknown
ICBC               0809AD07  Unknown               Unknown  Unknown
ICBC               08099B45  Unknown               Unknown  Unknown
ICBC               0804E7FD  Unknown               Unknown  Unknown
ICBC               0804AE52  Unknown               Unknown  Unknown
ICBC               0804983D  Unknown               Unknown  Unknown
libc.so.6          B7499748  Unknown               Unknown  Unknown
ICBC               08049771  Unknown               Unknown  Unknown
[lorna@thusharam ICBC]$

If anybody could help me make this work, many thanks in advance.

Mr. Rajesh J.
Junior Research Fellow,
Department of Atmospheric Sciences,
School of Marine Sciences,
Cochin University of Science and Technology, Lakeside Campus,
Finearts Avenue, Cochin 682016
Phone: 9846812663
e-mail: rajeshj@cusat.ac.in