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<https://github.com/IHP-GmbH/IHP-Open-PDK/issues/158|#158 MOS Devices Tests Aren't Working.>
Issue created by <https://github.com/AhmedLilah|AhmedLilah>
*Environment*

• Klayout Version: N/A
• OS/Platform: Ubuntu

*Expected Behavior*

provided MOS tests to run.

*Actual Behavior*

when I run any of the tests in xschem for the most devices I get an error while running ngspice saying

```
Error on line: 
&lt; the instance line&gt;
unknown device type - error
        Simulation interrupted due to error!

```

this is not the case with passives and BJTs it only happens with most devices the rest are working fine.

*Steps to Reproduce the Problem*

1. install the ihp-sg13g2 PDK using the make files and the python script in the xschem folder.
2. copy the ihp-sg13g2 PDK to the PDK_ROOT directory ( in my case /usr/local/share/pdk/)
3. copy the xschemrc file in xschme to my test directory
4. run `xschem`
5. open the test mos test.
6. netlist and run.
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>

<https://github.com/IHP-GmbH/IHP-Open-PDK/issues/158|#158 MOS Devices Tests Aren't Working.>
Issue closed as completed by <https://github.com/KrzysztofHerman|KrzysztofHerman>
<https://github.com/IHP-GmbH/IHP-Open-PDK|IHP-GmbH/IHP-Open-PDK>