note mbethke Windows? When I run Makefile.PL for DBD-ODBC-1.41 on Linux, I get the following: <code>unixODBC 2.3.1 DRIVERS............: /etc/unixODBC/odbcinst.ini SYSTEM DATA SOURCES: /etc/unixODBC/odbc.ini FILE DATA SOURCES..: /etc/unixODBC/ODBCDataSources USER DATA SOURCES..: /home/mb/.odbc.ini SQLULEN Size.......: 8 SQLLEN Size........: 8 SQLSETPOSIROW Size.: 8</code>All 64bit sizes.<br> dbdimp.h has this definition: <code> SQLLEN RowCount; /* Rows affected by insert, update, delete * (unreliable for SELECT) */</code> This member looks like it was the culprit here and somehow ended up as 32bit. The build output of DBD-ODBC should have some clues. 1007766 1007782