# What version of Natural is thread-safe under CICS? **URL:** \ **Category:** Forum\ **Tags:** Adabas-Natural, Natural, Natural-on-Mainframes, Natural-Database-and-TP-Monitor-Interfaces-on-Mainframes\ **Created:** [July 18, 2007, 3:19pm UTC](https://techcommunity.softwareag.com/t/what-version-of-natural-is-thread-safe-under-cics/75049 "2007-07-18T15:19:37Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Denis\_OSullivan](https://avatars.discourse-cdn.com/v4/letter/d/57b2e6/32.png) [@Denis\_OSullivan](https://techcommunity.softwareag.com/u/Denis_OSullivan)\ **Post date:** [July 18, 2007, 3:19pm UTC](https://techcommunity.softwareag.com/t/what-version-of-natural-is-thread-safe-under-cics/75049/1 "2007-07-18T15:19:37Z")
Can anybody tell me at what level of CICS and Natural the environment is thread-safe? Apologies if this has been answered before. I searched the archives and found no matches. ---
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [July 18, 2007, 5:51pm UTC](https://techcommunity.softwareag.com/t/what-version-of-natural-is-thread-safe-under-cics/75049/2 "2007-07-18T17:51:18Z")
NCI 4.2 is threadsafe. But you should be aware, that all modules CALLed by Natural via standard linkage serve serve as a logical extension to Natural and have to be threadsafe too; this includes user written CSTATIC and RCA programs and of course Adabas. ---
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [April 2, 2021, 2:48pm UTC](https://techcommunity.softwareag.com/t/what-version-of-natural-is-thread-safe-under-cics/75049/3 "2021-04-02T14:48:33Z")