The Error message “Error while uploading. Try again later” is shown by the Accuware Indoors App when your data connection (e.g. Wi-Fi or cellular) is lost and your device is not able to upload to the Accuware server the last set of fingerprint collected. We suggest to check to have a reliable data connection throughout the entire area before collecting the fingerprints or to upload the fingerprints when a data connection is available. Anyway when an upload fails, the Accuware Indoors App saves the last set of fingerprints collected allowing thus an upload in a later stage.