Dear all,
I am trying to calculate elbow angle of my fab structure using a online
software developed by Robyn L. Stanfield *et. al*. but it is giving a
solution with the following errors.

WARNING: rotation matrix contains significant additional contributions

WARNING: and deviates significantly from a pseudo-twofold    0.721

WARNING: rotation matrix contains significant additional contributions
WARNING: and deviates significantly from a pseudo-twofold :    0.726


WARNING: there have been deviations from expected values -
           please read the log above!)
           No guarantee that the calulated elbow angle is meaningful
           The Elbow angle is probably 174.5 deg.

*Kindly suggest some other way of accurately, calculating elbow angle.*

regards.

Tarique khan

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