In this simulation, we see the weight of the piece permanently displayed at each change operation room.
How come this operation.
Thank you for your reply.
But there whenever the previous weight that fits, so we can not have the same setting for two different variables.
I agree with David:
The current mass is shown by the system mass parameter and the original mass probably has been just added as a fix text or it exists as a parameter in the model that does not change during modification of the model.
For example you can use a relation old_mass = pro_mp_mass to assign the valuevalue, then comment the line for later use (if you want to make another mass the current one, just uncommment and verify relations).