Nonlinear Static, Riks with Imperfections from BUCKLE Analysis

[Vandale]

Hello,

I have used mesh-independent fasteners on the attachment points (Connector Assignment- MPC Beam & Coupling- Structural Distributing) For Built-up Back to Back CFS C- Setions. I ran a BUCKLE Analysis to get various eigenmodes & also got FIL File from the same. For Nonlinear Analysis, I had to Copy the model in the same CAE and run STATIC, RIKS Analysis, with Imperfections from FIL file but it is showing a warning saying that a few nodes are not found and the Analysis is getting Aborted and I checked that those are the same nodes used as attachment points to Fasteners.
Could someone suggest how to run Nonlinear Analysis with the fasteners help of BUCKLE Fil file?
Please find the attachment showing the warning.

Thanks

 

[FEA way]

This is just a warning but what is the error message ?

 

[Vandale]

Thanks for the reply.

I am attaching both the warnings and error that I am facing.

Warning:

https://files.engineering.com/getfi...-bb93-09a8583a6537&file=Nonlinear_Warning.png

Error:

https://files.engineering.com/getfi...d9-bc68-6a006602ae06&file=Nonlinear_Error.png

This is only happening when Attachment points (36 attachment points) and corresponding Mesh-Independent Fasteners are used. (Those are the nodes which are missing in the above warning.)
If I run the same model without both the Attachment points and corresponding Mesh-Independent Fasteners there won't be any error.

Thanks