Sharing variable between two robots multimove

Hello,
Simple question but
I have two robots on multimove system. I want to share the variable speed between the two robots (same parameter)

How to proceed ?
Robotstudio tall me all the time it doesn’t know “pers” variable from the other robot ..

Here below some example with toto string


Thank you
Regards,

you need to declare it in both tasks the same. each variable in its own task.