markdown/gh_discussions/Configuration/5213.md

# Running a simple combinatorial design

Tool: OpenDB

Subcategory: Module name mismatch

## Conversation

### Dandy201
Hi all, I'm new to using ORFS and tried some tutorials from https://github.com/The-OpenROAD-Project/micro2022tutorial. 
![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/172090682/8a6e4ccd-503a-4751-8ead-8c1c5d209890)

Completing exercise 5 got this simple output:
![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/172090682/63ead36e-c51b-456b-9526-819d76f8a209).

From this, I'm trying to make a simple combinational circuit. Running make DESIGN_CONFIG=../../half_Adder/config.mk, it always ends at this error:

7. Executing Verilog-2005 frontend: /home/dan/Desktop/Work/vlsi/tools/OpenROAD-flow-scripts/flow/platforms/asap7/yoSys/cells_clkgate_R.v
Using ABC speed script.
[FLOW] Extracting clock period from SDC file: ./results/asap7/halfAdder/base/clock_period.txt
[FLOW] Setting clock period to 5
8. Executing SYNTH pass.
8.1. Executing HIERARCHY pass (managing design hierarchy).
**ERROR: TCL interpreter returned an error: Yosys command produced an error
Command exited with non-zero status 1
Elapsed time: 0:00.59[h:]min:sec. CPU time: user 0.56 sys 0.02 (99%). Peak memory: 72508KB.
make[1]: *** [Makefile:496: do-yosys] Error 1
make: *** [Makefile:499: results/asap7/halfAdder/base/1_1_yosys.v] Error 2.**

Config file
![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/172090682/324abeb8-c78c-42a6-906f-811f9c4134b6)

Constraint file
![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/172090682/c305c964-35a7-4fae-b038-7cbb9539f98d)

Verilog file
![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/172090682/fe9cc773-67be-4235-a4b5-b66b06dee795)





### maliberty
Please package this as a standalone test case and attach it.  Reproducing it from screen shots is inefficient.

### Dandy201
[try.zip](https://github.com/user-attachments/files/15751707/try.zip)

Here's the  zip file along with the command : make DESIGN_CONFIG=../../try/config.mk


### mi-and-core
(1) change module name from 'half_adder' to 'halfAdder'


### maliberty
In the config.mk
```
export DESIGN_NAME = halfAdder
```
while in halfAdder.v:
```
module half_adder(
```
These names need to match.