NCVHDL simulation error

Sir, am getting this error when trying to elaborate the design

[root@localhost simulation]# ncelab WORK.trial:trial_rtl
ncelab: 10.20-p008: (c) Copyright 1995-2010 Cadence Design Systems, Inc.
ncelab: *W,DLMLUP: Unable to access modified marker for library 'std'.
        file: /cad/INCISIV102_lnx86/tools/inca/files/STD/.cdsvmod (Permission denied).
ncelab: *W,DLMLUP: Unable to access modified marker for library 'synopsys'.
        file: /cad/INCISIV102_lnx86/tools/inca/files/SYNOPSYS/.cdsvmod (Permission denied).
ncelab: *W,DLMLUP: Unable to access modified marker for library 'ieee'.
        file: /cad/INCISIV102_lnx86/tools/inca/files/IEEE/.cdsvmod (Permission denied).
ncvhdl_cg: *W,DLMLUP: Unable to access modified marker for library 'ieee'.
        file: /cad/INCISIV102_lnx86/tools/inca/files/IEEE/.cdsvmod (Permission denied).
ncvhdl_cg: *W,DLMLUP: Unable to access modified marker for library 'std'.
        file: /cad/INCISIV102_lnx86/tools/inca/files/STD/.cdsvmod (Permission denied).
ncvhdl_cg: *W,DLMLUP: Unable to access modified marker for library 'synopsys'.
        file: /cad/INCISIV102_lnx86/tools/inca/files/SYNOPSYS/.cdsvmod (Permission denied).