addRing creating rings outside design boundary

It seems that there is a glitch involved with creating the power ring.I set the floorplan with floorPlan -d $TOP_macro_sizex $TOP_macro_sizey 0.612 0.612 0.612 0.612 -noSnapToGrid

This sets the core and IO boundary properly and I can see the accurate measurements in the GUI.However, when I create the power ring using addRing -nets {VDD VSS} -type core_rings -follow core \
        -center 0 -layer {top M8 bottom M8 right M9 left M9} -width 0.04 -spacing 0.04

I receive this error,**WARN: (IMPPP-220): The power planner does not create core rings outside the design boundary. Check the design boundary, or specify valid offsets.
**WARN: (IMPPP-4051): Failed to add rings, because the IO cells might contain gaps. Run the 'addIoFiller' command to fill gaps between the cells and try again.

When I change the -follow  flag to io , Innovus creates a ring that is 1.0um away from the core boundary on all sides.