[icWasya]

Надо их описывать в одном блоке type, вот так

Код:

type
  pcg_field_desc = ^tcg_field_desc;
  pcg_message_desc = ^tcg_message_desc;
 
//type<- это убрать
  tcg_field_desc = record
    ...
    type_msg: pcg_message_desc;
  end;
 
  tcg_message_desc = record
    ...
    fields: pcg_field_desc;
    ...
  end;