StrainStress recorder for truss

[tangzhen]

How to record the StrainStress of the truss element when I do the dynamic analysis of a space structure in Opensees ? I know there is a recorder command of element about stressStrain, but it is for section fiber ,such as the command :recorder Element -file Element1.out -time -ele 1 3 section 1 fiber 0.10 0.10 stressStrain.
So I want to recored stressStrain of truss element , how to solve this problem. Thanks a lot.

[acv]

you can use a node recorder for the nodes that the element connects.
or an element recorder without the fiber tag
recorder Element -file Element1.out -time -ele 1 3 section 1 stressStrain.

[fmk]

recorder Element -file ele.out -time -ele 1 3 material stressStrain.