pss fails to converge or shows wrong fundamental

Hello,

I have some convergence problem during pss analysis. My circuit is an
LC oscillator and when I run transient analysis it will start
oscillating properly after some 5ns. I can read the fundamental
frequency then.

However, when I run pss analysis with fund=previously_found_freq
tstab=5n the analysis will fail to converge or sometimes will find a
fundamental approximately 10x higher that that from transient analysis.

My question therefore is if I could skip the initial transient analysis
(which is run before pss) and use the results and fundamental frequency
from my transient analysis.

writefinal="./file" option in transient analysis and readns="./file"
option in pss analysis don't work.

Thank you for your help.