FTP Failure while storing in flash! (0)

If anyone face this issue, can solve in 2 way

1. By changing IOS.
2. By changing TFTP.

IOS Change: When we’ll change major version change in WLC, firstly we’ve to check that if it’s a BUNDEL pack image or not. If it’s a BUNDLE pack image, you can’t install it. Below is the screenshot.

TFTP server change: Some times this issue is created for TFTP server. For that change TFTP to FTP.

Hope if you use this two way, the issues will be resolved.