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Newbie vlsiiiitm
Newbie
162 Views
Registered: ‎11-09-2018

[Implementation error]

[DRC MDRV-1] Multiple Driver Nets: Net ControlWriteEn_IBUF has multiple drivers: ControlWriteEn_IBUF_inst/O, and ab/ControlWriteEn_reg/Q.

Tcl Console message:

Route information for ControlWriteEn_IBUF
  Route status: UNPLACED
  This net has no placed pins
    Unplaced Pins:
      ControlWriteEn_IBUF_inst/O
      ab/ControlWriteEn_reg/Q
      coder1/Scratch/scratch_memory_i/blk_mem_gen_0/inst/native_mem_module.blk_mem_gen_v8_3_3_inst/async_clk_sched_clka_wf.memory[0][31]_i_14/I1
------------------------------------------------------------
  No route tree exists for this net.

How to resolve this error.

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2 Replies
Moderator
Moderator
136 Views
Registered: ‎02-09-2017

Re: [Implementation error]

Hi @vlsiiiitm,

 

From the error, it looks like the net ControlWriteEn_IBUF is being driven by both a Buffer and the Q output of a Register, which is not allowed.

Please open the synthesized schematic and try to locate those nets (you can CTRL + F the names) and see if that is really happening. If so, you'll need to modify your code to fix that.

Thanks,

Andre Guerrero

Product Applications Engineer

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Xilinx Employee
Xilinx Employee
101 Views
Registered: ‎05-08-2012

Re: [Implementation error]

Hi @vlsiiiitm.

I would try removing the multi-driver DRC. Was this DRC severity reduced? I would expect this to stop the flow before route_design. It could be helpful to open the elaborated design, and follow the net to both drivers. One of them should be removed.


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