Adding conditions in param section of dbCreateParamInst!!!

Hai everyone,

   I am trying to add conditions inside the dbCreateParamInst's param section, Is this possible??

 ie: i have two conditions cond1: MET1 cond2: MET1:pin which are elements in the table i created.

  I am checking the the length of each and if MET1 is the condition then i instantiate a pcell with layer being "MET1" "drawing" if length i find after parsing is 2 i instantiate with layer being "MET1" "pin"(instead of "drawing").Is this feasible??

 the code i created is:

         dbCreateParamInst(
            cvd mastercv "inst1" list(0 0) "R0" 1

                   list( list( "layer1"  "string"   if( length(parseString(car(Table[i])  ":")) = 1 then 
                                                                       list(car(Table[i]) "drawing")
                                                          else
                                                                      list(car(parseString(carTable[i]) ":"))
                                                                           cadr(parseString(car(Table[i]) ":"))))

                             )

When i run this i get the following WARNING:

 *WARNING*(parser): illegal left hand side of assignment operator -  length(parseString(car(Table[i])  ":"))  

Can anyone help?? Or is my concept of getting instants itself is wrong??

Thanks,

Messi