Importing encounter created GDSII file in virtuoso 6.1.5

I am facing an issue during import of an encounter RTL-to-GDSII 11.1 created gds2 file. I have a tsak of taking of place and routing digital logic block in encounter and importing the same into virtuoso 6.1.5 for mixed signal simulation. Following are the things i have been able to do so far.

--> I am using 90nm faraday standard  cells in umc 90nm technology. The same are imported in virtuoso library manager as symbols and been able to get a schematic view of my design.

--> For the same design I have layout with standard cells, verified geometry and connectivity. No errors and warnings seen. Using the default streamout.map file of umc, I have successfully obtained gds file of the design.

--> When I import the gds file into virtuoso 6.1.5, the Faraday standard cells donot show up. Following is the log file shown.

  ********************************************************************************
Product   : Virtuoso(R) XStream In
Program   : @(#)$CDS: strmin version 6.1.5 12/12/2012 15:27 (sjfnl003) $
          : sub-version  IC6.1.5.500.15
Started at: 21-May-2014  15:20:06
User Name : jagadishdn
Host Name : localhost.localdomain
Directory : /home/jagadishdn/umc90
CADENCE Design Systems, Inc.
********************************************************************************
Info: Cellview Rev Num:99,  Tech Rev Num:59

INFO (XSTRM-289): The automatic layer mapping is done by StreamIn. This is because either the layer mapping is not provided or the XST_AUTO_LM value is used with the -layerMap option.

Summary of Options:
        library                         t2
        strmFile                        cdac33.gds
        logFile                         strmIn.log
        topCell                         cdac33
        view                            layout
        case                            Preserve
        propSeparator                   ,
        techRefs                      faraday

WARNING (XSTRM-267): The referenced cell "OR3X1" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "OR2XLP" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "OR3B2XLP" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "NR3XLP" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "OR2B1XLP" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "QDFCRBX1" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "NR2XLP" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "QDFFX1" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "OA12X1" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "NR2X1" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
WARNING (XSTRM-267): The referenced cell "DFCRBX1" was not found. The OpenAccess design data was created for this cell without any reference. Ensure that the referenced cell exists and library is defined in the cds.lib file.
INFO (XSTRM-220): 1. Translating STRUCTURE cdac33_VIA1 as cellView t2/cdac33_VIA1/layout
INFO (XSTRM-61): Creating a new layer L7 in the technology file.
INFO (XSTRM-62): Creating a new layer:purpose pair L7:drawing in the technology file.
INFO (XSTRM-61): Creating a new layer L28 in the technology file.
INFO (XSTRM-62): Creating a new layer:purpose pair L28:drawing in the technology file.
INFO (XSTRM-61): Creating a new layer L19 in the technology file.
INFO (XSTRM-62): Creating a new layer:purpose pair L19:drawing in the technology file.
INFO (XSTRM-220): 2. Translating STRUCTURE cdac33_VIA0 as cellView t2/cdac33_VIA0/layout
INFO (XSTRM-220): 3. Translating STRUCTURE VIA34_stack_CROSS as cellView t2/VIA34_stack_CROSS/layout
INFO (XSTRM-61): Creating a new layer L49 in the technology file.
INFO (XSTRM-62): Creating a new layer:purpose pair L49:drawing in the technology file.
INFO (XSTRM-61): Creating a new layer L70 in the technology file.
INFO (XSTRM-62): Creating a new layer:purpose pair L70:drawing in the technology file.
INFO (XSTRM-61): Creating a new layer L61 in the technology file.

--> Please suggest me the way out.

Thanks

Jagadish D N