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Open older version files in a later version 1

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14.1.0 is OLDER than 14.2.4, so probably you will not able to open the file. Or you can try to export the model to another file format...
 
Try using .s2k (or .$2k) file.

Lets say that version 14.2.4 file was created in the computer A and the computer B has SAP v14.1.0 installed.

- Make sure computer B has the same regional configuration (decimal separator) of computer A. If it is not possible to check, take a look to the file created in computed B and identify decimal separator. Then you have two options a) Change regional configuration in computer B according to computer A. b) Change decimal separator in .s2k file according to computer B (find and replace). If you select the last option, make sure that the string containing version is period-separated and the string containing units is comma-separated, regardless decimal separator, as shown bellow:

TABLE: "PROGRAM CONTROL"
ProgramName=SAP2000 Version=14.2.4 CurrUnits="KN, m, C" ...

- Change the string contatining version to the desired release. In this case:

TABLE: "PROGRAM CONTROL"
ProgramName=SAP2000 Version=14.1.0 CurrUnits="KN, m, C" ...

- Make sure desired default units for the model are selected in SAP2000 graphic user interface (bottom-right).
- Try to import the model.
- Let us know any trouble.
 
It seems SAP2000 retains axial rigidity ... (also in compression?). This way for a static start and for the inner (mathematical entities) true elements work as a hinged chain. It is necessary to turn on the non-linear calculation to (partially?) get rid of axial compression and entirely of bending stiffness in the cables. I have seen other models snap where the triangle cables, 2 stay straight and 1 takes a catenary curve. In all, we see some battle on what SAP2000 has been geared for and the intricacies of these quite mechanism structures. We can manage to show "solutions" from SAP2000 that surely are the aone where the deterministic programming within SAP2000 bring the structure as defined, that corresponds to one of the infinite cases referred, as you have read, in the text; not to forget we have set some arbitrary loading. Even within the restrictions given and by just using the Mathcad worksheets we have been able to ascertain two kinds of solutions, one where the final configuration stands at the 30º rotation angle and forces need not to be null, and others maintaining the straight configurations of all members that relax all the stresses and forces to zero. There are as well curved configurations that should be feasible solutions of the zero stress kind, and I think to have found a pair starting both from straight and curved cables. It would be convenient to class the geometrical configurations and proportions to see what conditions allow for just straight final configurations and what others allow, or require, final curved configurations. Initially, examining only final configurations to see what straight configurations may migrate without length violations to curved ones. And well, a whole field of investigation could start frome here for just the kind of structure, plus, upon deeper knowledge of SAP2000, what SAP2000 can do with it.

I think it can do a nice dynamical analysis, chain-like but geometrically non linear and large deflection, and then see how the shape would be moving from where it started.

And the same, but static, is what be have been doing. Yet of course, finds a particular solution corresponding to our loading. Since it finds equilibrium, SAP2000 is not worried for the structure pertaining to a set able to take variegate equilibriums with other loadings, it is only concerned with what at hand.
 
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