09-05-2009, 02:12 AM
Instability warning will usually occur when some of the members degree of freedom are released and forces in the structure are flowing in all axis i.e. by declaring the member as truss, compression or tension only but there other members connecting to that member in orthogonal direction thus transfer of loads from the orthogonal direction is not restrained by any other member because of the member specification of the other. There are several ways to address this issue depending on the type of structure declared in the analysis i.e space, plane or truss.
Kindly attach your file so that I can check it and try to resolve your issue.
Kindly attach your file so that I can check it and try to resolve your issue.