Web Updater on RCM4310

I’m trying to use the web updater feature of the RCM4310 module but get an error message: error 11237 (Not a data message) calling fiValidate at line 2920 when I run the program

The following defines are set
ADMIN_USER = “admin”
ADMIN_PASS = “upload”
BU_TEMP_USE_SBF
USE_HTTP_UPLOAD
SSPEC_FLASHRULES
USE_RABBITWEB 1
USE_HTTP_DIGEST_AUTHENTICATION 1
TCPCONFIG 1
BOARD_UPDATE_VERBOSE

libs included:

#use “dcrtcp.lib”
#use “http.lib”
#use “http_client.lib”
#use “board_update.lib”

Under Project Options->Defines I have:
FIRMWARE_NAME = “app_name”
FIRMWARE_VERSION = 0x0100
ROOT_SIZE_4K = 4

The firmware structure gets cleared but no data is loaded into it.

Am I missing something?

Thank you,
Sam Virgillo

Addition/correction:
It is the firmware_info_t structure that does not get loaded.