( Excerpt from Ragas at a glance by Mr. S. R. Janakiraman)
Since " Nagumomu" is a song of total surrender and pleading to the Lord, it was composed in Aabheri. There is also no need to hide the fact that only Musiri Subrahmanya Iyer sang "Nagumomu" in Karnataka Devagandhari. It became very popular for a time. But people like Semmangudi continued to sing in the raga in which it was composed. After Balamurali's research and rendering of it in Aabheri, few people now sing in the way Musiri did.
http://arvindsdad.blogspot.com/2008/02/ ... dhari.html