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Set the stroke in joint mover

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Hi,
i'm trying to develop a smart component for eletrical gripper.
In particular i would set the movement for the joint of the mechanism with a property ( i have choose a double variable).
There are a problem, when i set the value in the field "Corsa" there is an error: "SC_Schunk_LEG400_v2: Il legame di proprietà non ha potuto impostare 'J1' (Il valore supera il massimo consentito)"
the value range of the joint are 0-100mm ...
i don't know how to solve it.
There are someone that can help me?
Best regards