# AttributeError(...) while trying to call system.serial.\*

**URL:** <https://forum.inductiveautomation.com/t/attributeerror-while-trying-to-call-system-serial/7647>\
**Category:** Ignition\
**Created:** [December 2, 2013, 9:29am UTC](https://forum.inductiveautomation.com/t/attributeerror-while-trying-to-call-system-serial/7647 "2013-12-02T09:29:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Tan4i](https://avatars.discourse-cdn.com/v4/letter/t/f17d59/32.png) [@Tan4i](https://forum.inductiveautomation.com/u/Tan4i)\
**Post date:** [December 2, 2013, 9:29am UTC](https://forum.inductiveautomation.com/t/attributeerror-while-trying-to-call-system-serial/7647/1 "2013-12-02T09:29:04Z")

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Traceback (most recent call last):  
File “event:actionPerformed”, line 3, in   
AttributeError: ‘com.inductiveautomation.ignition.common.script.Scr’ object has no attribute ‘serial’

action code for button:

`system.serial.configureSerialPort(\
port="COM3",\
bitRate=system.serial.BIT_RATE_9600,\
dataBits=system.serial.DATA_BITS_8,\
handshake=system.serial.HANDSHAKE_NONE,\
hardwareFlowControl=False,\
parity=system.system.PARITY_NONE,\
stopBits=system.serial.STOP_BITS_1)`

Ignition v7.6.4 (b2013112117)  
Java: Oracle Corporation 1.7.0\_45

seems .serial.configureSerialPort( recognised as attribute of some object…

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<div class="post-metadata">

**Author:** ![nmudge](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nmudge/32/3394_2.png) [@nmudge](https://forum.inductiveautomation.com/u/nmudge)\
**Post date:** [December 2, 2013, 1:28pm UTC](https://forum.inductiveautomation.com/t/attributeerror-while-trying-to-call-system-serial/7647/2 "2013-12-02T13:28:51Z")

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Hi,

Is the Serial Support Gateway module or Serial Support Client module installed on your Ignition server?

You have to install one of these before you can use the system.serial.\* functions.

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<div class="post-metadata">

**Author:** ![Tan4i](https://avatars.discourse-cdn.com/v4/letter/t/f17d59/32.png) [@Tan4i](https://forum.inductiveautomation.com/u/Tan4i)\
**Post date:** [December 11, 2013, 10:09am UTC](https://forum.inductiveautomation.com/t/attributeerror-while-trying-to-call-system-serial/7647/3 "2013-12-11T10:09:49Z")

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ur right  
but i cant understant why error report was so unfriendly saying “no field…” instead of “serial module not installed”  
any way thanks