Unable to flash custom recovery in Samsung j1 ace
My first thought is that your recovery image (.tar file) is either uncompatible or corrupted.

To prevent this :


Double-check that your recovery image is compatible with your exact
phone model. If it's not, ask the developer about it.
Check the control sum (md5sum, sha256sum, etc.) of your file once downloaded. If it's different from the sum on the website, download
it again (from another miror if possible).


You may also use Heimdall instead of Odin to flash your recovery image : https://www.glassechidna.com.au/heimdall/