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SOC Encounter: Failed to place a cell at (x, y) for followpin creation

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zhipeng

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sroute writes to the log many lines of the following, and then it fails to connect the power pads in the pad ring to the core...

Failed to place a cell at (2847.200 2651.600) for followpin creation
Failed to place a cell at (152.480 2653.280) for followpin creation
Failed to place a cell at (2847.200 2653.280) for followpin creation
Failed to place a cell at (152.480 2654.960) for followpin creation

The chip is 3000x3000, so all those coordinates are near the pads. What does "followpin" mean? What additional option do I need to get
"setSpecialRouteOption -orthogonal_connection_only 1 -drc_on 1
sroute -nets {VDD VSS AVDD AVSS CVDD CVSS HVDD HVSS} -allowJogging 0 -allowLayerChange 0"

to run correctly?
 

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