Error appear when I try use a conveyor

[ederobo]

Hello folks,

I am a newbie on RoboStudio. I am learning how work with this software. I have this error, please see this image:

How can I resolve this error?
Thanks

[ederobo]

Hello,

Anyone knows how can I solve this problem? Do you need more information?
Thanks

[Henrik_Berlin]

Hard to know what the problem is just by looking at the error message. Anyway, check that the preceding motion instruction uses a fixed workobject with a fine point. Ensure also that the argument to DropWobj is the connected wobj. If it still doesn’t work, read the conveyor tracking manual very carefully.