select
 (true and true) true_and_true,
 (true and false) true_and_false,
 (true and cast(null as boolean)) true_and_unknown,
 (false and true) false_and_true,
 (false and false) false_and_false,
 (false and cast(null as boolean)) false_and_unknown,
 (cast(null as boolean) and true) unknown_and_true,
 (cast(null as boolean) and false) unknown_and_false,
 (cast(null as boolean) and cast(null as boolean)) unknown_and_unknown
from dummy
union all
select
 true,
 false,
 cast(null as boolean),
 false,
 false,
 false,
 cast(null as boolean),
 false,
 cast(null as boolean)
from dummy

Error:
Access violation at address 00403FE8 in module 'edbmgr.exe'. Read of address
0A890867

"dummy" is a single-column table with the structure (col1 integer)
containing a single row with the null value.

Ole Willy Tuv

Ole,

This must be related to some other issue that has been fixed already since
it works fine here with the latest fixes applied.

--
Tim Young
Elevate Software
www.elevatesoft.com