I can??t tell from the screenshot which version of TBC you??re running. ?ÿWhen is the last time you updated Convert to Rinex?
That message would indicate an uninstall and reinstall is in order. Make sure you grab the newest version from the Trimble website: https://geospatial.trimble.com/trimble-rinex-converter
First, why are you needing to convert to rinex?
to send to OPUS? If so use the ??processing services ?? from the Survey tab. There is will send raw static files to opus for you and deliver back a XML file you can drag back into TBC
Any newer trimble reciever files don't need to be converted, older ones I think do. However, I haven't tried sending a .dat file to OPUS through TBC using the process services tab recently. Who knows, they may fix it for you.?ÿ