Seismosoft | Earthquake Engineering Solutions

Using the elfrm element with releases should not cause numerical instabilities, unless the model is unstable itself. Can you run eigenvalue analysis? Note also that the adaptive pushover with displacement loads (as in the displacement-based adaptive pushover for instance) cannot be employed with the...

Depending on the selected Standard, the eigenvalue analysis of the pushover analysis should employ the cracked or the uncracked stiffness. In particular in the European (EC8, Part-3) the American Codes (ASCE 41) the uncracked stiffness should be employed (and in employed in SeismoStruct). Seismosoft...

You could carry out a search in this form with the 'convergence' or 'divergence' term. You will find plenty of resources. Also there is a section in Appendix A in SeismoStruct's User Manual, called 'Tips to Solve Convergence Problems'
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The truss element provides stiffness only in the translations DOFs. It seems that some of the elements are not correctly in rotation (e.g. a member that is by itself a cantilever).
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It could be a problem with very large loading. You could check (i) if you have specified possible strength reduction in the code-based checks and/or the performance criteria (ii) if you have reached the fracture/buckling steel strain, which is be default 20% (i.e. it is already very large). You can ...

The message means that the program cannot achieve convergence, due to instabilities in the model.
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The error means that some of the degrees-of-freedom are not connected to the structure, there is no equilibrium and the program cannot find a solution. Make sure that all the members of the model are correctly connected.
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What you could do is the following: 1) Check other sources of divergence, if you carry out a search for 'convergence' or 'divergence' in the forum you will find plenty of resources. 2) check if you have step reduction, due to divergence. Check in the Convergence Details tab the locations/elements of...

The message is a warning. It means that there is uplift in one of the footings after the application of the initial (gravity) loading, which is not reasonable. If this is something that you expected, ignore the message
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Kirkaguel, SeismoSelect selects records from the NGA and ESM databased that match a given target spectrum. Because the selection is based on the flat files of the databases, there is no possibility of applying direct amplitude scaling before the selection. After you download the records from the dat...