for( 0 .. $#{$self->columns} ) {
	$CurrentColumnName = $self->columns->[$_];
    if( !(defined $self->flatfield_start->[$_] 
    and defined $self->flatfield_length->[$_] ) 
    ) {
	# Field is missing interface_start, interface_length or both, skip it.
	next;
    }
    if ($self->datatype->[$_] =~
         /^(?:TINYINT|MEDIUMINT|SMALLINT|INT|INTEGER|BIGINT|FLOAT|DOUBLE)$/
    ) {
        $hr_returnvalue->{$CurrentColumnName} = 0 + 
            substr( $textinput, 
               $self->flatfield_start->[$_], $self->flatfield_length->[$_] );
    }else {
        $hr_returnvalue->{$CurrentColumnName} = 
             substr( $textinput, 
                 $self->flatfield_start->[$_], $self->flatfield_length->[$_] );
            $hr_returnvalue->{ $CurrentColumnName } =~ 
                 s/^\s*(.*?)\s*$/$1/;    # Trim whitespace
    }
        
 # Fill empty fields with that field's default value, if such a value is defined