Any tips on how to encounter ERROR: PDN-0185 & like errors.

[nishit0072e]

orfs@DESKTOP-CTSQVPJ:~/OpenROAD-flow-scripts/flow$ make DESIGN_CONFIG=./designs/sky130hd/mod16_counter/config.mk floorplan
Running pdn.tcl, stage 2_4_floorplan_pdn
[ERROR PDN-0185] Insufficient width (13.60 um) to add straps on layer met5 in grid "grid" with total strap width 21.6 um and offset 0.0 um.
Error: pdn_local.tcl, 26 PDN-0185
Command exited with non-zero status 1
Elapsed time: 0:02.39[h:]min:sec. CPU time: user 1.18 sys 0.20 (57%). Peak memory: 126868KB.
make[1]: *** [Makefile:447: do-2_4_floorplan_pdn] Error 1
make: *** [Makefile:445: results/sky130hd/mod16_counter/base/2_4_floorplan_pdn.odb] Error 2

whenever I tr to run a custom design, I got this, sometime works for big designs and sometimes for small designs. But maximum time I get this error. Any help will be highly appreciated 🙏

[maliberty]

@gadfort suggestions? The message should probably include a location or more data

[nishit0072e]

I have made a copy of pdn.tcl file and included it in config.mk file from local workspace for modification into it, but after tierless modification I get same error

[gadfort]

The message probably can be reworded, the issue is that the straps on met5 won't fit l, you can adjust the spacing and width of the straps to make them fit in the block area

[maliberty]

Can you provide a test case?

[nishit0072e]

Test Case like, I was trying with mod16 counter. Should I paste the verilog code, config & constraint file here?

[maliberty]

make DESIGN_CONFIG=./designs/sky130hd/mod16_counter/config.mk pdn_issue should package the test case

[nishit0072e]

Upon running make DESIGN_CONFIG=./designs/sky130hd/mod16_counter/config.mk pdn_issue I got this and some of the files have been generated.

[maliberty]

Please upload the pdn*gz file assuming it has no proprietary content.

[nishit0072e]

pdn_mod16_counter_sky130hd_base_2025-04-05_20-15.tar.gz

[maliberty]

Sorry this got lost. It is better to file an issue than a discussion for such problems. Your problem is to the core area is tiny:

You likely have some issue in your floorplan setup.