I found the classes and .ecf file for the original report (attached).
With these classes, there is an invariant violation when calling
{EV_HORIZONTAL_SPLIT_AREA}.extend (tag is splitter_in_valid_position_minimum).

This fails with the above invariant violation on 5.7.65008.  I am unable
to test with 6.0.67183 (the latest Solaris SPARC version) because I apparently
cannot get the compiler to monitor all assertions on Vision2 library
(or at least the trace output seems to indicate that it isn't monitoring
them).  Please try with the attached classes on latest 6.0, if you
know how to get it to monitor all assertions on every class.

Reopening report.