I try to use Cadence design kit gpdk045 but unable to attach the technology library to a newly created library with error:

The binary file 'tech.db' was not found in library 'gpdk045'

However the file is there in gpdk045 directory. I have installed the kit and created the cds.lib according to the instructions in reference manual. These are the steps I followed:
1) In .bashrc the environment variables were set
export CDS_Netlisting_Mode=Analog
export CDSHOME=/home/eda/ic610
but I also have another variable: export CDS_ROOT=/home/eda/ic610 and hope it does not create problem.
2) In the work directory I created a cds.lib file with following entry
INCLUDE /home/user/edasrc/cadence_pdk045/gpdk045_v_3_5/cds.lib
3) and finally created a link in the work directory
ln -s /home/user/edasrc/cadence_pdk045/gpdk045_v_3_5/models
Where is the problem and why I cannot attach the technology library? In CIW it says Loaded gpdk045/libInit.il successfully!