Help me to solve the non-convergence issue on my analysis.
It keeps on doing the iteration... what adjustment should I do aside from adjusting the stiffness and friction on support?

It is very hard to solve this non-convergence issue than the stress-over issue of the system.

Thank you in advance.

Sincerely,
marchie

You need to determine why it's failing to converge. Pause the calculation and look at the supports CAESAR is having issues with over the course of a series of iterations.

Is it lifting off supports? Do you have friction specified at those supports? Try killing the friction.

Is it having troubles closing gaps? Specify an anchor point somewhere intelligent.

In addition to Mr Fletcher, CAESAR II Webinar: Failure to Launch – Resolving Non-convergence in CAESAR II at November 6, 2014 could help you.
Also, try find previous topic about non-convergence issue. It has been discussed a lot.