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o   Switching AutoCommit mode from on to off or vice versa may fail.  
+You should always check for errors, when changing AutoCommit mode.  T
+he suggested way of doing so is using the DBI flag RaiseError.  If yo
+u don't like RaiseError, you have to use code like the following:

...
if ($dbh->{'AutoCommit'}) {
# An error occurred!
}