Generate Post Synthesis Netlist

You say a post-synthesis simulation? Do you mean post-fit? Are you writing a .vho/vo and .sdo file out? I looked at a design I have with initialization files, and created a .vo file for modelsim. When I search through this, I see the memories called out(at the block level, e.g. if it takes 8 M4Ks in the fit, then there will be 8 separate M4Ks called out) but they all have an .mem_init parameter with initialization values in them. So I assume all the info is there, although I'm not actually simulating the design. Please make sure you have an SR opened on this, so someone can help you debug it.