Just some side-commands.

kejohm didn't say so, but he also dropped the double quotes around single scalar variables. They here only function as forced stringification of the two variables for user/password, wich disables undef (which is valid). I did include hist quotation fixes below. The optional arguments after the driver prefix (dbi:ODBC:) are seperated by semi-colons, not colons. User and password are not optional.

The DSN for ODBC is kinda special, please use 'perldoc DBD::ODBC::FAQ' to read all about it.

sub open_dbi
{
    # Declare and initialize variables
    my $host        = "192.168.1.3";
    my $db          = "d60380940";   # NEEDS QUOTES
    my $db_user     = "root";        # NEEDS QUOTES
    my $db_password = "root";        # NEEDS QUOTES

    # Connect to the requested server

    # MySQL example
    my $dbh = DBI->connect ("dbi:mysql:$db:$host", $db_user, $db_passw
+ord, {
        RaiseError         => 1,         # When expecting problems, EN
+ABLE!
        PrintError         => 1,         # When expecting problems, EN
+ABLE!
        ShowErrorStatement => 1,         # When expecting problems, EN
+ABLE!
        FetchHashKeyName   => "NAME_lc", # Always be predictable in ke
+y names
        }) or err_trap ("Cannot connect to the database");

    # ODBC example        semi-colon, not colon ---.    ,------- Needs
+ Host= prefix
    my $dbh = DBI->connect ("dbi:ODBC:DSN=d60380940;Host=192.168.1.3",
+ undef, undef, {
        RaiseError         => 1,         # When expecting problems, EN
+ABLE!
        PrintError         => 1,         # When expecting problems, EN
+ABLE!
        ShowErrorStatement => 1,         # When expecting problems, EN
+ABLE!
        FetchHashKeyName   => "NAME_lc", # Always be predictable in ke
+y names
        }) or err_trap ("Cannot connect to the database");
    return $dbh;
    }
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