Is call to ImageInfo() required for SetNewValue()

[sjDelaney]

Must you always call ImageInfo before SetNewValue when not testing for the existence or value of any tag?
Can I go straight to SetNewValue after creating a new Object without calling ImageInfo()?

        my $exifTool = new Image::ExifTool;     # Create a new exifTool Object
        $Info = ImageInfo($File,\@TagList);     # Open File and return tag list
       
        #   Set new values to Subject and HierarchicalSubject
        $exifTool->SetNewValue();               # Clear previously queued values
        $exifTool->SetNewValue('Subject' => $Subject);
        $exifTool->SetNewValue('HierarchicalSubject' => $Subject);
       
        #   Write to file
        my $Write = $exifTool->WriteInfo($File);

[Phil Harvey]

No, absolutely not.  If you are just writing you shouldn't be calling ImageInfo().

- Phil

[sjDelaney]

Thanks.