# Devlink status 9999 **URL:** \ **Category:** Programming\ **Tags:** arsim\ **Created:** [February 5, 2026, 12:30pm UTC](https://community.br-automation.com/t/devlink-status-9999/10024 "2026-02-05T12:30:20Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Matjaz\_Kopac](https://avatars.discourse-cdn.com/v4/letter/m/FF8800/32.png) [@Matjaz\_Kopac](https://community.br-automation.com/u/Matjaz_Kopac)\ **Post date:** [February 5, 2026, 12:30pm UTC](https://community.br-automation.com/t/devlink-status-9999/10024/1 "2026-02-05T12:30:20Z")
I am testing network connection between PLC application runing in AS simulator and other PC where I have shared folder. I want to use DevLink because the network credentials and folder path can be changed by end user anytime later. I am using latest AS version 12 with AR J4.93. I’ve used DevLink many times in older AS version projects with no problem, but never before in simulation. Now I get DevLink status 9999 what should mean that this function is not implemented. No other FileIO functions are used, at the moment I only want to attach a network device. Is this function available in simulation mode? ![Devlink_9999](https://europe1.discourse-cdn.com/brcommunity/original/2X/f/fd81d74504d58cda555684145ab08c848bf01e7c.png) ---
**Author:** ![michael.bertsch](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/michael.bertsch/32/239_2.png) [@michael.bertsch](https://community.br-automation.com/u/michael.bertsch)\ **Post date:** [February 5, 2026, 12:35pm UTC](https://community.br-automation.com/t/devlink-status-9999/10024/2 "2026-02-05T12:35:15Z")
Hello, DevLink has limitations on an ArSim. They are documented in AS-Help. [DevLink](https://help.br-automation.com/#/en/6/libraries/fileio/fbks/devlink.html) ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/9/95bc7ab5e623ebe5d31cd7977f21f183d156880f.png) You have to use a real PLC to test these kind of connections. Greetings Michael