Invalid Parameter Name

Hello All,

I am not seeing why this is an invalid parameter name. I have used this parameter several times before without issues. What am I missing?

I am thinking software issue. I am going to see if we have any other robots with the same software version. This parameter is a way of monitoring if the robot is physically moving. The newer versions have another parameter $ROB_MOVE but the older versions you have to use the $FILTER_EMPT. Basically once all the axis stop moving the "filter" is empty so this parameter goes true.