This software seems to have a bug.
When the operation mode of Dynamixel is set to velocity mode, the value of 104 Goal Velocity can only be positive but not negative.
At least for now, XL430-W250-T and XM430-W210-T have this situation.
My colleague was able to debug the Dynamixel normally with the previous version of R+ Manager 2.0, but when he updated to the latest version, there was a problem mentioned earlier.
So I think there's a problem with the software.
Thank you for reporting the issue.
I just checked with XL-430 and XM430-W210 from R+Manager 2.0(v2.2.13) but could not identify the issue with the negative Goal Velocity(104) operation when DYNAMIXEL is set to Velocity Control Mode.
Could you specify the test condition?