# NaturalONE - "invalid I/O performed on server" when mapping a unix server **URL:** \ **Category:** Forum\ **Tags:** Adabas-Natural, Natural, Natural-on-Linux, NaturalONE\ **Created:** [January 25, 2021, 10:52am UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242 "2021-01-25T10:52:58Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Stephane\_c](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Stephane\_c](https://techcommunity.softwareag.com/u/Stephane_c)\ **Post date:** [January 25, 2021, 10:52am UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/1 "2021-01-25T10:52:58Z")
Hello, Sorry if the subject has already been discussed somewhere in the forum but i didn’t find anything. I have Sofware AG Designer 10.5 installed on my PC and natural 9 on a remote Unix Server. NDV is running on this serveur. When i try to map Natural One with this server, i get the following error message “invalid I/O performed on server” I wasn’t able to find logs on Win or Unix, but I note, using adaopr on unix, that i can see my profile accessing some Adabas files, so i guess a connexion occurs Any help is highly appreciate, ---
**Author:** ![wolfgang.winter](https://sea1.discourse-cdn.com/techcommunity/user_avatar/techcommunity.softwareag.com/wolfgang.winter/32/17954_2.png) [@wolfgang.winter](https://techcommunity.softwareag.com/u/wolfgang.winter)\ **Post date:** [January 25, 2021, 11:18am UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/2 "2021-01-25T11:18:43Z")
Stephane, are you using Natural Security ? Errors like this happen, for example, when there is an NSC Logon exit issuing an interactive message. ---
**Author:** ![Stephane\_c](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Stephane\_c](https://techcommunity.softwareag.com/u/Stephane_c)\ **Post date:** [January 25, 2021, 12:14pm UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/3 "2021-01-25T12:14:15Z")
thanks for your reply, Indeed, we are using natural security. So it could be an authorisation issue ? Is there a way to know what kind of error happend with NSC ? ---
**Author:** ![wolfgang.winter](https://sea1.discourse-cdn.com/techcommunity/user_avatar/techcommunity.softwareag.com/wolfgang.winter/32/17954_2.png) [@wolfgang.winter](https://techcommunity.softwareag.com/u/wolfgang.winter)\ **Post date:** [January 25, 2021, 12:30pm UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/4 "2021-01-25T12:30:52Z")
Sure ! SYSSEC → A (Administration Services) → E (Logon/countersign errors) ---
**Author:** ![Stephane\_c](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Stephane\_c](https://techcommunity.softwareag.com/u/Stephane_c)\ **Post date:** [January 25, 2021, 1:38pm UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/5 "2021-01-25T13:38:20Z")
I had a look, but the only record i found was me loggin to syssec with a wrong user. However, i succeed in mapping my environnement by adding etid=$$ STACK=‘(logon LIB user pwd)’ in the session parameters. must be something somewhere i don’t fully understand yet… Thank you for your time and your help. ---
**Author:** ![wolfgang.winter](https://sea1.discourse-cdn.com/techcommunity/user_avatar/techcommunity.softwareag.com/wolfgang.winter/32/17954_2.png) [@wolfgang.winter](https://techcommunity.softwareag.com/u/wolfgang.winter)\ **Post date:** [January 25, 2021, 1:41pm UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/6 "2021-01-25T13:41:22Z")
You might want to check if “user” has a default library defined which has a startup-program, if this outputs a map … ---
**Author:** ![Stephane\_c](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@Stephane\_c](https://techcommunity.softwareag.com/u/Stephane_c)\ **Post date:** [January 25, 2021, 1:52pm UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/7 "2021-01-25T13:52:58Z")
Yes, i think that’s the right guess. we do have a logon map… Thank you very much for your help ! ---
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [April 25, 2021, 1:53pm UTC](https://techcommunity.softwareag.com/t/naturalone-invalid-i-o-performed-on-server-when-mapping-a-unix-server/238242/8 "2021-04-25T13:53:16Z")
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.