1) by using "OSS-based netlister with irun"
ERROR: Missing .cdb or .oa file in library c090_phy_lib cell c090_bias view
bhv.
  The OSS netlister requires a .cdb  or .oa file in lib/cell/view
directory.
  If one does not exist, you can create one either by importing the
text file using Verilog In or VHDL IN, or by opening and writing the file in the
Library Manager.

Question: How can I generate .cdb or .oa with VHDL behavioral code? I already have (master.tag pc.db prop.xx vhdl.vhms) in that compilation directory.

2) by using "cellview-based netlister with ncvlog,ncelab,ncsim"
ncelab: *N,SFEDPL: Deploying new SFE in analog engine.
ncelab: *W,DLWNEW: Intermediate file entity C090_PHY_LIB.C090_BIAS (AST)
     is newer than expected by architecture C090_PHY_LIB.C090_BIAS:BHV (AST)
           actual:   Fri Oct  8 09:37:06 2010
           expected: Wed Oct  6 10:08:14 2010.
.vdd_c( net25 ), .c_atb1( net19 ), .c_atb0( net14 ), .c_atb3(
             |
ncelab: *E,CFMPTC (./ihnl/test/tb_c090_bias_dc/schematic/verilog.vams,25|14): VHDL port C090_BIAS.VSSC1 (/user/r1/temp/C_PHY/02/compiled/nccoex/c090_phy_lib/c090_bias/entity/vhdl.vhms:
line 56, position 12) type is not compatible with Verilog.

Question: Is there limitation on VHDL in ams simulation? How to solve it?

Thanks in advance