Large Deflection

I have modelled for riser and spool configuration in SACS, I have done static analysis but I found the result of my analysis with large value of deflection, since it happened in my analysis, my friend suggest me to run "static large deflection" analysis, when I change the analysis generator into static large deflection, I found the error" below:

"THE FOLLOWING CARD HAS A BAD FORMAT"

Other question,
Please give me explanation of using springs joint.

Best Regards,
MI

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