Leaderboard

There are a variety of formats supported by PNG, my version of the PNG suite contains 157 different files. The File-based VIs will handle 154 of the 157 files. The string-based one will handle 59 of the 157. Clearly NI has written/licensed a nearly compliant PNG reader, why it is not using the same one in both cases is beyond me. I was annoyed when I first saw the string based VIs hidden deep in the palettes (having written my own). After some quick testing the crappiness (technical term) was soon apparent so I was glad to have made the effort. The simple .NET solution may be an option for you if you are on a Windoze machine.

Uncheck: "Tools > Options > Security > Login option > Show the login prompt at LabVIEW Startup time"

There can be some different structures although anything which is PNG should be readable by a PNG reader (if that makes sense). I will take a proper look at the code myself later but I made a VI to pull the PNG files appart to see what is inside, maybe it will identify some differences? You can find the code at https://decibel.ni.com/content/docs/DOC-19620

One thing I noticed is that when running LabVIEW as the shell, the Aero theme doesn't load (I'm guessing that is a service started by Explorer). So if you develop with Aero turned on, then deploy where it is off, many fonts will be wrong. And it is likely your controls in the windows won't line up right. My fix was to let Explorer start (starting Aero) then kill it with my LabVIEW application. This also will kill any shortcuts like Win + E, Win + D. I never tried but it is likely you could just start the right theme service and have it work properly but I never tried that. EDIT: I also found that command to allow operators in the Users group, access to write files.