Problems Importing OA Design from Virtuoso into Encounter

Hello, 

While trying to perform place and route using Encounter I'm "encountering" errors importing my design from Virtuoso. When I try to import the design, I get the following:

Reading tech data from OA Library 'NCL' ...
FE units: 0.001 microns/dbu, OA units: 0.001 microns/dbu, Conversion factor: 1
**WARN: (ENCOAX-775):   Layer 'OVERLAP' has already been defined in Encounter database, the contents will be skipped.
**WARN: (ENCOAX-713):   Unsupported Layer direction for layer 'RX'. Check the layer information in OA technology database.
**ERROR: (ENCOAX-719):  Pitch of layer 'RX' is 0. Check the layer information in OA technology database.
**ERROR: **ERROR: (ENCSYT-16006):       Error in reading LEF information from OA reference libraries. Check the OA database provided.

RX is the active layer and should not be routable, however, Encounter is looking for pitch information. This layer should not be used in place and route at all. The only reason I can think of that Encounter might need it would be in RX_M1 vias. How do I tell Ecnounter to ignore this layer? Could I change the prRules section of my technology file? Here is that section of my tech file:

prRules(

 prRoutingLayers(
 ;( layer                       preferredDirection  )
 ;( -----                       ------------------  )
  ( PC                           "halfRoute" )
  ( RX                           "halfRoute" )
  ( M1                           "horizontal" )
  ( M2                           "vertical" )
  ( M3                           "horizontal" )
  ( M4                           "vertical" )
  ( M5                           "horizontal" )
  ( M6                           "vertical" )
  ( M1_2B                        "horizontal" )
  ( M2_2B                        "vertical" )
 ) ;prRoutingLayers

 prViaTypes(
 ;( device viewName             viaType    )
 ;( ---------------             -------    )
  ( ("PC_M1" "symbolic")    "default"  )
  ( ("RX_M1" "symbolic")    "default"  )
  ( ("M1_M2" "symbolic")    "default"  )
  ( ("M2_M3" "symbolic")    "default"  )
  ( ("M3_M4" "symbolic")    "default"  )
  ( ("M4_M5" "symbolic")    "default"  )
  ( ("M5_M6" "symbolic")    "default"  )
  ( ("M6_M1_2B" "symbolic")    "default"  )
  ( ("M1_2B_M2_2B" "symbolic")    "default"  )
 ) ;prViaTypes

 prRoutingPitch(
 ;( layer                pitch )
 ;( -----                ----- )
  ( "M1"         (plus (techParam "grM1Width") (techParam "grM1Space")) )
  ( "M2"         (plus (techParam "grM2Width") (techParam "grM2Space")) )
  ( "M3"         (plus (techParam "grM3Width") (techParam "grM3Space")) )
  ( "M4"         (plus (techParam "grM4Width") (techParam "grM4Space")) )
  ( "M5"         (plus (techParam "grM5Width") (techParam "grM5Space")) )
  ( "M6"         (plus (techParam "grM6Width") (techParam "grM6Space")) )
  ( "M1_2B"         (plus (techParam "grM1_2BWidth") (techParam "grM1_2BSpace")) )
  ( "M2_2B"         (plus (techParam "grM2_2BWidth") (techParam "grM2_2BSpace")) )
 ) ;prRoutingPitch

) ;prRules

Thank you for your help.