Thanks for the suggestion...unfortunately it did not work. A different error popped up as noted below. Do I have the right Autonomous file which was downloaded from Cisco website "1240-k9w7-tar.123-8.JEA3" & unzipped it to "c1240-k9w7-mx.123-8.JEA3". Tried WinZip & 7z to unzip file.
The updated file "c1240-k9w7-tar.124-25d.JA2.tar" is only available for download with a valid service contract associated my Cisco.com profile, which I do not have. If anyone can access this file & send it to me, it would be very much appreciated.
Following the steps, I downloaded the Cisco file "1240-k9w7-tar.123-8.JEA3" & unzipped it to "c1240-k9w7-mx.123-8.JEA3". I then renamed the unzipped "c1240-k9w7-mx.123-8.JEA3" file to "c1240-k9w7-tar.default" which was placed in the tftp directory, which resulted in the original "Tar Checksum Error". Thus, it is correctly placed in the tftp directory. Is there any other files which must be present as this is the only file I placed there...there were a few other small files upon unzipping the file?
If you choose to overwrite the current file, issue the archive download-sw /overwrite /reload t -name command. The / overwrite option overwrites the software image in flash with the downloaded image. The /reload option reloads the system after you download the image unless the configuration is changed and not saved. For //location , specify the IP address of the TFTP server. For image name , specify the Cisco IOS filename that you plan to use to upgrade the access point. In this example, the command is archive download-sw /overwrite /reload t -k9w7-tar.124-10b.JA3.tar. As mentioned earlier, do not change the name of the Cisco IOS file. Leave it as the default. You find these logs during the successful file transfer:
d5bc57d000