In my Openshift account there are 3 applications created. For these applications I have used JBOSS(appa), PHP(appb) and Ruby(appc) cartridges.
Following this document; I had added a custom URL such as www.myweb.org on appa application. This configuration had been working fine for long time. Now, I wanted to point my application to other application appb. For this I removed alias www.myweb.org from appa and following same document I executed all configuration steps for appb.
Problem
www.myweb.org is not accessible.
What I have done
For my testing I configured another another sub domain wed.myweb.org on the same appb. This domain works correctly and site is accessible with this new sub domian and URL.
I have checked Dig web interface; this www.myweb.org is pointing to correct application URL from Openshift server as cname record.
Please provide some pointer for debugging the issue.
Are you sure it's not about DNS change propagation? If the domain names you posted are real, www.myweb.org works just fine (and I am pretty sure it would for you too by now).