Specifications

PERFORMING DOWNLOADS
Download from a USB Flash Drive
146 VX 520 REFERENCE GUIDE
8
<application prompt>
If the downloaded application successfully
authenticates, the corresponding application
prompt or logo is displayed upon restart.
The terminal can now process transactions.
Note: The message DOWNLOAD NEEDED
appears if:
• The *GO variable is not set.
• *GO does not specify that an application is
present.
• The application did not authenticate (invalid
or missing *.p7s file).
• The application uses shared libraries that
are missing or were not authenticated
(invalid or missing *.p7s files).
If one or more executables in the application
fail to successfully authenticate, the
application may not run. If the application
attempts to access an unauthenticated
executable or library, it may crash. Repeat the
Direct Application Download Procedure using
the correct certificates and/or signature files.
For more information on startup errors, see
STARTUP ERRORS.
DOWNLOAD NEEDED
<error message>
Table 22 USB Flash Drive Download Procedure
Step Display Action