Question about J-Tube

Hi
My name is Ockto
I'm newbie in SACS.
Now, i'm doing my task about roll up part of jacket.
I also model J-Tube with joint naming is JC_ _ and JD _ _ 

When i run, i got error in matrix decomposition, which is part of my J-Tube model.


Anyone can help me to solve this problem?
I am very grateful for your help

This is my sacs file

https://www.dropbox.com/s/s3e21ahpnoi82zl/sacinp.coba32?dl=0