Hope it is not too late. If the anchor is modeled as 1D bar, then 3rd option is the correct one. Please copy the error text here.

I would also recommend to check Construction process Tutorial.

I have a model with shear anchors between concrete and a FRP sheet. I would like to eliminate one anchor along the analysis.

I tried with some construction process conditions:

   -   I used condition "Element activity for line" to delete the anchor, but it didn't seem to have any effect
   -   I used condition  "Reinforcement inactivity in line" changin the material for the anchor to another with a reduced modulus of elasticity, but it also seem to have no effect.
   -   I used condition  "Reinforcement inactivity in line" making the anchor inactive, but it gave me an error message
   -   I used the "Show Material Activity" at the interval section, but it told me to only use this technique for macroelements and not for line elements.

What could be a better approach to eliminate an specific reinforcement line along the analysis? Could you please tell me the steps I need to follow to eliminate on specific line element in the middle of the analysis?

I send you my model to cervenka@cervenka.cz

Thanks a lot