JR45592 The resulting string from the ICONV function with the S option can lead to unmappable character warnings

The environment variable DSE_SOUNDEX_BEHAVIOR was added to alter the 
behavior of the S code option to ICONV and the SOUNDEX functions.  When
set to 1, the resulting string will be empty if the first character is
not A - Z or a - z.  When unset or not 1, there is no change in the
original behavior.  (The resulting string has the possibility of being
unmappable.)  The environment variable can be set for all of DataStage
by adding it to $DSHOME/dsenv, on a project basis through the Administrator,
or just for a particular job with the addition of a Before-job subroutine
using ExecTCL to run ENV SET DSE_SOUNDEX_BEHAVIOR=1.