I am trying to analyse an aluminium frame but sections to be used are not in database so I tried USERTABLE and made 2 sections First is 30x20x1.4 mm channel section and second is SHS 40x40x1.4 . After runing analysis it throughout an error as in subject line...... I read other posts regarding this same issue but could not reach to solution how previously it was solved for others.
Can you please let us know the version of STAAD.Pro you are using?
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Global Technical Support
Staadpro v8i series 6 V 20.07.11.33