warning 88 and 89 in feko

I simulated a horn antenna in feko at 10.3Ghz.
when I running i get warning 88 and 89 that singular field on the surface of triangle and edges
can someone help me about meshing of that?

send me your *cfx feko file to examine your feko error..

my feko version is feko_5.2
Can you send your email address to mail it for you?
thanks alot for your help