I worked around the problem mentioned earlier by replacing all:

    {EV_ANY_I}.some_constant

by:

    implementation.some_constant

in classes EV_ENVIRONMENT and EV_ANY.

Now I get this exception trace:

Segmentation violation: OPERATING_SYSTEM_SIGNAL_FAILURE raised (OPERATING_SYSTEM_SIGNAL_FAILURE)
******************************** Thread exception *****************************
In thread           Root thread            0x0 (thread id)
*******************************************************************************
-------------------------------------------------------------------------------
Class / Object      Routine                Nature of exception           Effect
-------------------------------------------------------------------------------
EV_CURSOR           replace_implementation @3
                                           Segmentation violation:
<000000000AC61670>  (From EV_ANY)          Operating system signal.      Fail
-------------------------------------------------------------------------------
EV_CURSOR           replace_implementation @3
<000000000AC61670>  (From EV_ANY)          Routine failure.              Fail
-------------------------------------------------------------------------------
EV_PIXMAP_IMP       promote_to_drawable @3                              
<000000000AC616AC>                         Routine failure.              Fail
-------------------------------------------------------------------------------
EV_PIXMAP_IMP       set_font @2                                         
<000000000AC616AC>                         Routine failure.              Fail
-------------------------------------------------------------------------------
EV_CURSOR           set_font @3                                         
<000000000AC61670>  (From EV_FONTABLE)     Routine failure.              Fail
-------------------------------------------------------------------------------

It occurs when calling:

     {ISE_RUNTIME}.check_assert (False)

in EV_CURSOR.replace_implementation. So it looks like all Non-object-calls which were allowed in the past (constant attributes and external routines) now crash at runtime with 17.11.10.1019.

--
Eric Bezault