Problem with geomTransf command

[r0d4n]

Dear Silvia,

I'm working on a 3D RC frame fiber model, 2x2 bays, 4 storeys.
I am doing a Time history analysis.

I'm having a problem with the geometric transformation command.

I'm following the example 7 - 3D RC Frame

global coordinates system

y
|
|____x
/
/
z

I define the geometric transformation in this way (as in the example):

geomTransf Linear 1 0 0 1 ; # all columns
geomTransf Linear 2 0 0 1 ; # all beams
geomTransf Linear 3 1 0 0 ; # all girders

The analysis fails with this error message:

LinearCrdTransf3d::getLocalAxes
vector v that defines plane xz is parallel to x axis
ForceBeamColumn3d::setDomain(): Error initializing coordinate transformation

I don't have any idea about where this comes from.
Should I look at the element connections?
Or is it a problem with the fiber sections?

Let me know if I have to provide more info.

[fmk]

the problem is with one of the coordinate transformations (i don't know which and the error message is not all that helpful in identifyng it which i will rectify) .. the error message is sayig that the elements local axis and the vector you have defined in the coordinate transformation are the same)

[r0d4n]

Thank you for your answer, Frank.

The problem is in the coord. transf., though.
I have to put the right coordinates in the geomTransf command.

It is weird because I followed the example 7, as I wrote.

I'm modeling a 3d frame in Opensees for the first time.
I sincerely didn't get exactly how the 3D geomTransf works.

I've seen the example on the web manual and I noticed it is different compared with the same example on page 296 of the pdf manual.

I'm very confused about that.

I'm also very confused about the right definition of the orientation of the fiber section.
should Idefine the sections with z-left y-up or z-up y-right, considering that z is the local coordinate for up?
Does it influence the geomTransf command in any way?

I apologyze for my multiple questions.

[r0d4n]

Problem solved!

The mistake was in the geomTrans IDtags of the nonlinearBeamColumn elements.
Some of them were not assigned correctly.