How to convert EWC images?

[JustTakeTheFirstStep]

I converted to EWC using TFTP.

But the following error message appears.

"This downgrade is prohibited due to image partition difference between two versions!"

Current AP Running Image : 8.10.151.0
Version trying to upgrade: C9800-AP-universalk9.17.08.01

AP#ap-type ewc-ap tftp://10.0.15.204/ap1g6a tftp://10.0.15.204/C9800-AP-iosxe-wlc.bin

what am i missing??

[Flavio Miranda · Accepted solution]

Hi

  Usually Cisco stablish an "Upgrade Path " you must follow. You can not upgrade to any version.  Refer to this document:

https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-7/release-notes/rn-17-7-9800.html 

If you can not find clear guidance, try to upgrade to something aroung 16.X and then to 17.X

[Rich R · Accepted solution]

What model is the AP (guessing from image name it should be C9124 or C9130)?

I'd suggest upgrading it with a 17.3 CAPWAP image first and then try the EWC upgrade to 17.8

[JustTakeTheFirstStep]

You are right.
This was resolved last week.
I will organize the case.
I converted a 9130 LAP to a 17.8 EWC image.
However, the CAPWAP AP had problems connecting to the 17.8 EWC.
I configured TFTP server in EWC, upgraded CAPWAP AP to 17.3, and then upgraded to 17.8 in TFTP server again.