AT&T Co was showing visitors to the Comdex show in Las Vegas a highly critical report on AIX, the core technology chosen by the Open Software Foundation for its alternative Unix version, according to Electronic News. It was written by Archer Group experts given an advance preview of the new release of AIX by the Foundation. The report is said to highlight significant migration and portability problems, and identifies technical problems with the AIX virtual memory management subsystem. The inability of AIX to support existing file system and object-file formats would be enormous, with thousands of programs to convert, said the report, which also says that the virtual memory subsystem is a hardware dependent feature designed for certain styles of hardware architecture.