9105AXI Failed Converted to EWC (17.12.3.31)

[valfar]

Hello,

I wanted to Convert 9105AXI to EWC mode but failed with this error 

AP-V01#ap-type ewc-ap tftp:/10.10.10.2/ap1g8 tftp://10.10.10.2/C9800-AP-iosxe-wlc.bin
Download script called with args:[-l tftp://10.10.10.2/C9800-AP-iosxe-wlc.bin -m 2]
Starting download eWLC image tftp://10.10.10.2/C9800-AP-iosxe-wlc.bin ...
It may take a few minutes. If longer, please abort command, check network and try again.
######################################################################## 100.0%
Checking ...OK
Checking image size...OK
Checking image family...OK
Verifying ...OK
Versioning ...ws_management_version: 17.12.03.0.3740
Successfully downloaded and setup eWLC image.
Image download completed.
Download script called with args:[-l tftp:/10.10.10.2/ap1g8 -m 0]
Error: tftp:/10.10.10.2/ap1g8 not supported in image_download.sh.
Download script called with args:[-c]
Cleanup eWLC files ...

Please share your insight about not supported in image_download.sh, is there any specific file extension that i need to add to ap1g8 file? 

Thank you

[marce1000]

- Ref : https://www.cisco.com/c/en/us/products/collateral/wireless/embedded-wireless-controller-catalyst-access-points/presentation-c97-743421.html
   >....Ensure the Catalyst 9100 CAPWAP AP has AireOS 8.10 or Cisco^® IOS XE Release 16.12.1s code prior to converting to an EWC AP. Images are available on cisco.com.

+ Make sure that  your ap1g8 image file is in sync with  the 9800 wlc bin file (not having mixed up versions in a tftp directory)
+ If all of this does not apply then  try to convert from another version then 17.12.3 , preferably use a new tftp
   source directory to put the files in (to avoid confusion)

 M.

[Rich R]

What version is the AP currently running?
Did you observe the upgrade path as per the release notes?
https://www.cisco.com/c/en/us/td/docs/wireless/controller/ewc/17-12/rel-notes/ewc-rn-17-12-x.html#upgrade-path-to-cisco-ios-xe-dublin-17.11.x
I find it is generally safest to first upgrade to the CAPWAP version of the same release, still following the correct upgrade path, which means you might need to upgrade to 17.3.x or 17.6.x first and only then attempt the conversion.

So install the interim version (if required) then upgrade to https://software.cisco.com/download/home/286324892/type/286288051/release/15.3.3-JPQ2 and then attempt the conversion to EWC 17.12.3