Peter

I think it would be very useful to expose the cutRows command to the tcl interface since I've had to cut rows before without wanting to add the tap cells...

@maliberty I used the access points in ODB for this as a template. This will allow us to add a `global_connect` call at the very end of the flow to...

@maliberty I moved all the global connection code to ODB and remove it from PDN. I added the helper functions from PDN to dbBlock.

> It is best to avoid a force push on something that is already in review. I can't see the changes since the last review in GH when that happens...

> The partial pdn lines could possibly be cleaned up by pdngen (@arlpetergadfort ) but it would be simplest to just OBS to whole area. They aren't actually a violation...

@QuantamHD is this design dependent? I don't get this behavior. But I do get: ``` >>> set clock_ports {} ... foreach clock [all_clocks] { ... foreach pin [$clock sources] {...

@QuantamHD could you upload a test case that replicates it for you? I can't seem to get it on my end.

@QuantamHD if there is a stack trace that might be helpful.

@QuantamHD I'm able to get a stack trace if I add your code to a script at startup and run openroad with `-gui` `-exit`, are you adding the -exit? this...

@QuantamHD does this prevent the issue you are seeing? https://github.com/The-OpenROAD-Project/OpenROAD/pull/2285