They asked if you enabeled unicode support when installing, https://metacpan.org/pod/DBD::ODBC#Enabling-and-Disabling-Unicode-support:

On non-Windows platforms Unicode support is disabled by default. To enable it specify -u to Makefile.PL when you configure DBD::ODBC.

In reply to Re^3: perl odbc mssql encoding problem by marto
in thread perl odbc mssql encoding problem by ori smaug

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