cc3200 ota update on amazon s3

Thanks for answer me,
a last thing first of close this thread: I've tried to create my app dropbox follow the guide at link processors.wiki.ti.com/.../CC32xx_Over_The_Air_Update_Application but when I try to open the link www.dropbox.com/.../Apps it redirects me to the dropbox home and on top of page it gives me that the /Apps folder doesn't exists. Then I try to publish my app, but now the app is in review.
I have to wait to confirm me the app to test the functionality?

Thanks in advance.

EDIT:

I've tried to execute the application, but the function sl_extLib_OtaRun give me error -4. Where I can found this error code?

EDIT 2:

In the ota_api.h I've found this

RUN_STAT_ERROR_RESOURCE_LIST   -4

How I can resolve this?

Edit 3:

I've tried to print on UART the vendorstr

with UART_PRINT("Vendor : %s\n\r",ucVendorStr);

and it print me Vid01_Pid00_Ver0002 that I haven't create on my dropbox, infact, after I create this folder when I press SW3 button, it gives me that there aren't new updates.

Then I've followed the guide at link  

that say the folder "Vid01_Pid00_Ver0087" contains service pack

the folder Vid01_Pid00_Ver0088 the old version

the folder Vid01_Pid00_Ver0188 the new firmware version

but the ota example search the folder Vid01_Pid00_Ver0002. How I change the folders?

I solved 

sprintf((char *)&ucVendorStr[ulVendorStrLen],"%02lu",
sDisplayInfo.sNwpVersion.NwpVersion[3]);

this instruction concatenate the 3rd cypher to the vendorstr that in my case is 2 and the %02 write it on two cypher

Were you ever able to get OTA working with AWS S3? I am looking at doing this now and I would love to know what problems / solutions you had.

Do you know if there is a working example somewhere?