# system.serial.openSerialPort crashes client **URL:** \ **Category:** Ignition\ **Created:** [March 23, 2021, 1:19pm UTC](https://forum.inductiveautomation.com/t/system-serial-openserialport-crashes-client/44792 "2021-03-23T13:19:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![mathieu.thibodeau](https://avatars.discourse-cdn.com/v4/letter/m/65b543/32.png) [@mathieu.thibodeau](https://forum.inductiveautomation.com/u/mathieu.thibodeau)\ **Post date:** [March 23, 2021, 1:19pm UTC](https://forum.inductiveautomation.com/t/system-serial-openserialport-crashes-client/44792/1 "2021-03-23T13:19:41Z")
hi, I’m using Ignition 7.7.4 with the serial support client module V 2.7.4, and as soon as I try to open the serial port, the client crashes. The port is not already open and not used by anything else. Any Idea? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [March 23, 2021, 1:21pm UTC](https://forum.inductiveautomation.com/t/system-serial-openserialport-crashes-client/44792/2 "2021-03-23T13:21:02Z")
You may need to upgrade to the latest version of 7.7 and hope that it no longer crashes. The old serial library we used needed to be updated every time a newer Windows version came out. It would crash if you tried to open a port an on unsupported version. Sounds like you might be experiencing the same problem. ---
**Author:** ![mathieu.thibodeau](https://avatars.discourse-cdn.com/v4/letter/m/65b543/32.png) [@mathieu.thibodeau](https://forum.inductiveautomation.com/u/mathieu.thibodeau)\ **Post date:** [March 23, 2021, 1:22pm UTC](https://forum.inductiveautomation.com/t/system-serial-openserialport-crashes-client/44792/3 "2021-03-23T13:22:51Z")
Allright thanks a lot I’ll see if I can upgrade the gateway!