Zaribok: RenderMan exporter

[nigec]

I've just been giving this a try, it seems to work fine until you try and edit a material from Outliner

crash dump:

Code:

Dump written 2016-6-8_12-59
Version: 2.0.4
Window: geom
Reason: function_clause

Short stack trace:
[]

Long stack trace:
[{wings_plugin,check_dialog,
     [[{vframe,
           [{vframe,
                [{vframe,
                     [{hframe,
                          [{label,"Shader name:"},
                           {text,"paintedplastic",[{key,surf_shader}]}]},
                      {vframe,
                          [{label,"Parameters:"},
                           {text,[],[{key,surf_params},{width,100}]}]}]}],
                [{title,"Surface shader"},{minimized,false}]},
            {vframe,
                [{vframe,
                     [{hframe,
                          [{label,"Shader name:"},
                           {text,[],[{key,disp_shader}]}]},
                      {vframe,
                          [{label,"Parameters:"},
                           {text,[],[{key,disp_params},{width,100}]}]}]}],
                [{title,"Displacement shader"},{minimized,true}]}],
           [{title,"RenderMan Options"},{minimized,true}]}],
      wpc_zaribok],
     [{file,"c:/Users/uabdgud/src/wings/src/wings_plugin.erl"},{line,96}]},
{wings_plugin,check_dialog,2,
     [{file,"c:/Users/uabdgud/src/wings/src/wings_plugin.erl"},{line,98}]},
{wings_plugin,check_dialog,2,
     [{file,"c:/Users/uabdgud/src/wings/src/wings_plugin.erl"},{line,98}]},
{wings_plugin,dialog_1,3,
     [{file,"c:/Users/uabdgud/src/wings/src/wings_plugin.erl"},{line,86}]},
{wings_material,edit_dialog,4,
     [{file,"c:/Users/uabdgud/src/wings/src/wings_material.erl"},{line,680}]},
{wings_material,edit,3,
     [{file,"c:/Users/uabdgud/src/wings/src/wings_material.erl"},{line,637}]},
{wings_develop,time_command,2,
     [{file,"c:/Users/uabdgud/src/wings/src/wings_develop.erl"},{line,81}]},
{wings,raw_command,4,
     [{file,"c:/Users/uabdgud/src/wings/src/wings.erl"},{line,638}]}]

If I disable the plugin, I can then right click and edit materials again