# Installation over linux **URL:** \ **Category:** Ignition\ **Created:** [March 9, 2012, 1:20pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126 "2012-03-09T13:20:47Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\ **Post date:** [March 9, 2012, 1:20pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/1 "2012-03-09T13:20:47Z")
Hello! Trying to install Ignition 7.3.4 over Scientific Linux and I got this: [code]WARN | wrapper | 2012/02/20 17:11:09 | An encoding declaration is missing from the top of configuration file: WARN | wrapper | 2012/02/20 17:11:09 | /usr/local/bin/ignition/wrapper-license.conf WARN | wrapper | 2012/02/20 17:11:09 | trying the system encoding. WARN | wrapper | 2012/02/20 17:25:40 | An encoding declaration is missing from the top of configuration file: WARN | wrapper | 2012/02/20 17:25:40 | /usr/local/bin/ignition/wrapper-license.conf WARN | wrapper | 2012/02/20 17:25:40 | trying the system encoding. WARN | wrapper | 2012/02/20 17:26:42 | An encoding declaration is missing from the top of configuration file: WARN | wrapper | 2012/02/20 17:26:42 | /usr/local/bin/ignition/wrapper-license.conf WARN | wrapper | 2012/02/20 17:26:42 | trying the system encoding. WARN | wrapper | 2012/02/21 08:15:29 | An encoding declaration is missing from the top of configuration file: WARN | wrapper | 2012/02/21 08:15:29 | /usr/local/bin/ignition/wrapper-license.conf WARN | wrapper | 2012/02/21 08:15:29 | trying the system encoding. WARN | wrapper | 2012/02/21 08:16:03 | An encoding declaration is missing from the top of configuration file: WARN | wrapper | 2012/02/21 08:16:03 | /usr/local/bin/ignition/wrapper-license.conf WARN | wrapper | 2012/02/21 08:16:03 | trying the system encoding. [/code] How can I fix this problem? ---
**Author:** ![Greg.Buehler](https://avatars.discourse-cdn.com/v4/letter/g/ecc23a/32.png) [@Greg.Buehler](https://forum.inductiveautomation.com/u/Greg.Buehler)\ **Post date:** [March 9, 2012, 2:36pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/2 "2012-03-09T14:36:01Z")
I think the last time this problem came up (see: [viewtopic.php?f=72&t=7046](http://www.inductiveautomation.com/forum/viewtopic.php?f=72&t=7046)) the answer was to just ignore the warning messages. ---
**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 9, 2012, 3:22pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/3 "2012-03-09T15:22:22Z")
> [@gbuehler](#): > > I think the last time this problem came up (see: [inductiveautomation.com/foru ... =72&t=7046](http://www.inductiveautomation.com/forum/viewtopic.php?f=72&t=7046)) the answer was to just ignore the warning messages. Sadly that's still the state of things. I haven't looked into it further, but the encoding is certainly not missing from the top of the config file and everything still works despite that warning. ---
**Author:** ![mgross](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mgross/32/3311_2.png) [@mgross](https://forum.inductiveautomation.com/u/mgross)\ **Post date:** [March 9, 2012, 3:41pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/4 "2012-03-09T15:41:13Z")
Does the gateway start? If not, then /var/log/ignition/wrapper.log is the place to check out. ---
**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\ **Post date:** [March 14, 2012, 8:22am UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/5 "2012-03-14T08:22:27Z")
Hello, The service doesn’t start. The answer trying to start the service is: `te67# ./ignition start Starting Ignition Gateway... Waiting for Ignition Gateway.............................. WARNING: Ignition Gateway may have failed to start. te67# ` Some ideas? ---
**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\ **Post date:** [March 14, 2012, 8:34am UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/6 "2012-03-14T08:34:41Z")
Hi, The content of the wrapper is: `STATUS | wrapper | 2012/03/14 07:58:48 | --> Wrapper Started as Daemon STATUS | wrapper | 2012/03/14 07:58:48 | Java Service Wrapper Standard Edition 32-bit 3.5.4 STATUS | wrapper | 2012/03/14 07:58:48 | Copyright (C) 1999-2010 Tanuki Software, Ltd. All Rights Reserved. STATUS | wrapper | 2012/03/14 07:58:48 | http://wrapper.tanukisoftware.com STATUS | wrapper | 2012/03/14 07:58:48 | Licensed to Inductive Automation for Ignition Gateway STATUS | wrapper | 2012/03/14 07:58:48 | STATUS | wrapper | 2012/03/14 07:58:48 | Launching a JVM... INFO | jvm 1 | 2012/03/14 07:58:48 | WrapperManager: Initializing... INFO | jvm 1 | 2012/03/14 07:58:48 | WrapperSimpleApp Error: Class com.inductiveautomation.catapult.Catapult found but could not be initialized: java.lang.ClassFormatError: com.inductiveautomation.catapult.Catapult (unrecognized class file version) ERROR | wrapper | 2012/03/14 07:58:50 | JVM exited while loading the application. STATUS | wrapper | 2012/03/14 07:58:55 | Launching a JVM... INFO | jvm 2 | 2012/03/14 07:58:55 | WrapperManager: Initializing... INFO | jvm 2 | 2012/03/14 07:58:55 | WrapperSimpleApp Error: Class com.inductiveautomation.catapult.Catapult found but could not be initialized: java.lang.ClassFormatError: com.inductiveautomation.catapult.Catapult (unrecognized class file version) ERROR | wrapper | 2012/03/14 07:58:56 | JVM exited while loading the application. STATUS | wrapper | 2012/03/14 07:59:01 | Launching a JVM... INFO | jvm 3 | 2012/03/14 07:59:01 | WrapperManager: Initializing... INFO | jvm 3 | 2012/03/14 07:59:01 | WrapperSimpleApp Error: Class com.inductiveautomation.catapult.Catapult found but could not be initialized: java.lang.ClassFormatError: com.inductiveautomation.catapult.Catapult (unrecognized class file version) ERROR | wrapper | 2012/03/14 07:59:03 | JVM exited while loading the application. STATUS | wrapper | 2012/03/14 07:59:07 | Launching a JVM... INFO | jvm 4 | 2012/03/14 07:59:07 | WrapperManager: Initializing... INFO | jvm 4 | 2012/03/14 07:59:07 | WrapperSimpleApp Error: Class com.inductiveautomation.catapult.Catapult found but could not be initialized: java.lang.ClassFormatError: com.inductiveautomation.catapult.Catapult (unrecognized class file version) ERROR | wrapper | 2012/03/14 07:59:09 | JVM exited while loading the application. STATUS | wrapper | 2012/03/14 07:59:14 | Launching a JVM... INFO | jvm 5 | 2012/03/14 07:59:14 | WrapperManager: Initializing... INFO | jvm 5 | 2012/03/14 07:59:14 | WrapperSimpleApp Error: Class com.inductiveautomation.catapult.Catapult found but could not be initialized: java.lang.ClassFormatError: com.inductiveautomation.catapult.Catapult (unrecognized class file version) ERROR | wrapper | 2012/03/14 07:59:15 | JVM exited while loading the application. FATAL | wrapper | 2012/03/14 07:59:15 | There were 5 failed launches in a row, each lasting less than 300 seconds. Giving up. FATAL | wrapper | 2012/03/14 07:59:15 | There may be a configuration problem: please check the logs. STATUS | wrapper | 2012/03/14 07:59:16 | <-- Wrapper Stopped ` ---
**Author:** ![Greg.Buehler](https://avatars.discourse-cdn.com/v4/letter/g/ecc23a/32.png) [@Greg.Buehler](https://forum.inductiveautomation.com/u/Greg.Buehler)\ **Post date:** [March 14, 2012, 1:22pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/7 "2012-03-14T13:22:26Z")
[quote=“SamJaimes”] ` STATUS | wrapper | 2012/03/14 07:59:07 | Launching a JVM... INFO | jvm 4 | 2012/03/14 07:59:07 | WrapperManager: Initializing... INFO | jvm 4 | 2012/03/14 07:59:07 | WrapperSimpleApp Error: Class com.inductiveautomation.catapult.Catapult found but could not be initialized: java.lang.ClassFormatError: com.inductiveautomation.catapult.Catapult (unrecognized class file version) ERROR | wrapper | 2012/03/14 07:59:09 | JVM exited while loading the application.`[/quote] I’d say this is the problem… ---
**Author:** ![mgross](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mgross/32/3311_2.png) [@mgross](https://forum.inductiveautomation.com/u/mgross)\ **Post date:** [March 14, 2012, 3:05pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/8 "2012-03-14T15:05:29Z")
Strange, I have never seen that error message before. Some more questions: Was Ignition installed from the binary .run file, or unzipped from a zip file? Which Linux distro are you using? Which JVM/version are you using? (Sun Java 6, OpenJDK 6, etc) Did you change the install location from /usr/local/bin/ignition? (if installing from the .run file) My first thought would be to try uninstalling and installing again. If that still doesn’t work, it might be best to call in to IA support so we can do a Goto meeting and take a look at your box setup. ---
**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\ **Post date:** [May 25, 2012, 10:54am UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/9 "2012-05-25T10:54:41Z")
Hello, The used distro is scientific linux This computer has open jdk 4 and open jdk 6 installed No, I didn’ change the install location ---
**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:** [May 25, 2012, 2:40pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/10 "2012-05-25T14:40:37Z")
Sounds like Java 4 is the version on the path, not Java 6. You can modify ignition.conf to point to the Java 6 binary. ---
**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\ **Post date:** [May 30, 2012, 3:28pm UTC](https://forum.inductiveautomation.com/t/installation-over-linux/4126/11 "2012-05-30T15:28:51Z")
Yeah, the problem was because the Java 4. I did a java upgrade and voilà. All is ok Thanks!