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#openlane
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# openlane
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Anton Blanchard

01/29/2021, 3:23 AM
I get a bunch of these when hardening my DFFRAM based macro:
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[WARNING GRT-0009] missing route to pin LBANK.COLUMN\[1\].RAMCOLS.B_0_0.SLICE\[7\].RAM8x32.WORD\[5\].<http://W.B3.CG/CLK|W.B3.CG/CLK>
Not sure if missing routes are sometimes expected, or a bug
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Amr Gouhar

01/29/2021, 2:16 PM
@Ahmed Ghazy: Any ideas?
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Ahmed Ghazy

01/29/2021, 2:34 PM
It's a bug as far as I know, but I wasn't able to find a small enough test case to find out what's causing it. It happens in
estimate_parasitics -global_routing
, so FastRoute is somehow unable re-interpret its own guides correctly as far as I know because TritonRoute had no issue finding routes to the mentioned pins.
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