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<https://github.com/The-OpenROAD-Project/OpenLane/issues/655|#655 Diode Insertion Problem at TritonRoute>
New issue created by <https://github.com/BYCakar|BYCakar>
*Description*

To reduce antenna violations, I tried the configuration DIODE_INSERTION_STRATEGY = 5. When I did that, I got an error message in detailed routing phase. The log file is full of these warning messages, which can be seen in attachments.

```
...
[WARNING DRT-0246] ANTENNA__17693__A/DIODE from _00054_ has nullptr as prefAP.
[WARNING DRT-0246] ANTENNA__17694__A2/DIODE from _00054_ has nullptr as prefAP.
[WARNING DRT-0246] ANTENNA__17695__A/DIODE from _00054_ has nullptr as prefAP.
[WARNING DRT-0246] ANTENNA__17703__A/DIODE from _00054_ has nullptr as prefAP.
[WARNING DRT-0246] ANTENNA__17711__A/DIODE from _00054_ has nullptr as prefAP.
[WARNING DRT-0246] ANTENNA__23141__S/DIODE from _00116_ has nullptr as prefAP.
...

```

Flow successfully finishes when DIODE_INSERTION_STRATEGY = 3. In that case there is no diode usage. It seems like the problem is with diode usage, but I have no clue what is wrong.

*Reproduction Material*

There is a github repository that includes source codes of my design.  
<https://github.com/BYCakar/caravel_yonga-100m-ethernet|https://github.com/BYCakar/caravel_yonga-100m-ethernet>

*Logs*

```
[24-tritonRoute.log](<https://github.com/The-OpenROAD-Project/OpenLane/files/7381832/24-tritonRoute.log>)

```
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>