hfss lack of precision

[error] Adaptive solution setup, process abc3d : Failed to solve the problem due to lack of precision. The likely cause is that the frequency is too low.

The error will be gone at higher frequencies such as 10 GHz, but frequency band of my interest is 10 MHz

Hi
I think your structure is small compare to that frequency and this causes that error
it's better that you change meshing options
I hope it will be helpful