Differences between Interactive COBOL 4.xx         (4.00) 10-Oct-2008
and Interactive COBOL 3.xx


1.  ICOBOL 4 allows both ICOBOL 3 format .cx files and ICOBOL 2
    format .cx files to be run.

    An additional IC2X license option is available for a runtime
    license to allow this to be done.  This option is especially
    useful for those who want to move forward with logging,
    thinclient support, etc. but cannot or do not want to
    recompile their programs.

    While running ICOBOL 3 or 4 .cx files, ICOBOL 2 .cx files
    cannot be called from the same runtime process.

    While running ICOBOL 2 .cx files, ICOBOL 3 or 4 .cx files
    cannot be called from the same runtime process.

2.  Under Windows, ICOBOL 4 provides only a single ThinClient,
    icrunrc, that provides both character and GUI support.
    Thus the thinclient will behave just like a thickclient
    runtime in that you can run both character and GUI
    executables.

    So there is no ICTHINS or ICTHINS executable.

    In the configuration file, the selection icthins, has been
    removed for @CON remote connections.

    In the Windows installer there is only one thinclient.

    All thinclients require an ICRUNRC license.

3.  Under Windows, all runtime processes require a runtime license.
    In the past some runtimes did not "count" as a license.

4.  System messages are preloaded by default thus not requiring a
    message file.

    If messages must be changedm ICMAKEMS can still be used to
    change then although with a new format.  See the ICOBOL
    Utilites Manual.

5.  Logged files must be converted to the new updated logging format
    via the ICLOG utility before they can be opened.


End of Differences