# Issues with Ignition upgrade 7.9 to 8.1 **URL:** \ **Category:** Ignition\ **Tags:** ignition81, ignition79\ **Created:** [January 11, 2023, 5:33pm UTC](https://forum.inductiveautomation.com/t/issues-with-ignition-upgrade-7-9-to-8-1/68494 "2023-01-11T17:33:10Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![guipinper](https://avatars.discourse-cdn.com/v4/letter/g/ce73a5/32.png) [@guipinper](https://forum.inductiveautomation.com/u/guipinper)\ **Post date:** [January 11, 2023, 5:33pm UTC](https://forum.inductiveautomation.com/t/issues-with-ignition-upgrade-7-9-to-8-1/68494/1 "2023-01-11T17:33:10Z")
Hi, we are preparing an update of ignition 7.9 to 8.1 of our production server. To this end, we prepared a testing instance running 7.9.18 (our production version) with a copy of the production gateway and executed the 8.1 installer: `sudo ./ignition-8.1.20-linux-64-installer.run` (The command shows version 8.1.20, although the latest version is .23, but the outcome was the same) After running the installer I get an "Ignition Successfully Upgraded" but the gateway fails to start: > WrapperSimpleApp Error: Unable to locate the class com.inductiveautomation.catapult.Catapult : java.lang.ClassNotFoundException: com.inductiveautomation.catapult.Catapult Note: I also get the same error message when attempting to upgrade Ignition by using the Restore feature. That is, push the 7.9.18 .gwbk file into a fresh installation of Ignition 8.1. I'm not sure what to do to solve this problem, and I couldn't find any helpful tips in the forum. Does anyone have any advices? Best regards, Guilherme. [wrapper.log](https://forum.inductiveautomation.com/uploads/short-url/2XIlQXQ3RroJLGw1Zu3eXmHGXfc.log) (297.9 KB) ` ---
**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:** [January 11, 2023, 5:37pm UTC](https://forum.inductiveautomation.com/t/issues-with-ignition-upgrade-7-9-to-8-1/68494/2 "2023-01-11T17:37:59Z")
Can you share your `ignition.conf` file? It looks like something weird may be going on there: ```auto WARN | wrapper | 2023/01/11 17:10:42 | The "wrapper.java.classpath.3" property was redefined on line #61 of configuration file: /usr/local/bin/ignition/data/ignition.conf WARN | wrapper | 2023/01/11 17:10:42 | Old Value wrapper.java.classpath.3=lib/core/gateway/* WARN | wrapper | 2023/01/11 17:10:42 | New Value wrapper.java.classpath.3=/lib/core/common/org.eclipse.jgit-5.1.3.201810200350-r.jar ``` ---
**Author:** ![guipinper](https://avatars.discourse-cdn.com/v4/letter/g/ce73a5/32.png) [@guipinper](https://forum.inductiveautomation.com/u/guipinper)\ **Post date:** [January 11, 2023, 5:50pm UTC](https://forum.inductiveautomation.com/t/issues-with-ignition-upgrade-7-9-to-8-1/68494/3 "2023-01-11T17:50:55Z")
Of course, it is attached. On the production server we installed git as an attempt to create a version control system for the various scripts and graphical components. [ignition.txt](https://forum.inductiveautomation.com/uploads/short-url/nnOPNvRpyKP9hJAqTNQrcGEp5zM.txt) (8.7 KB) ---
**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:** [January 11, 2023, 5:54pm UTC](https://forum.inductiveautomation.com/t/issues-with-ignition-upgrade-7-9-to-8-1/68494/4 "2023-01-11T17:54:12Z")
Fix the numbering in that section so 3 isn't re-defined: ```auto wrapper.java.classpath.1=lib/wrapper.jar wrapper.java.classpath.2=lib/core/common/* wrapper.java.classpath.3=lib/core/gateway/* wrapper.java.classpath.4=/lib/core/common/org.eclipse.jgit-5.1.3.201810200350-r.jar wrapper.java.classpath.5=/lib/core/common/jsch-0.1.54.jar wrapper.java.classpath.6=/lib/core/common/commons-compress-1.5.jar wrapper.java.classpath.7=/lib/core/common/JavaEWAH-0.3.2.jar ``` You can probably just remove 4-7 all together, you don't need to explicitly specify them when `lib/common/*` is already on the classpath. It may also be incorrect that they are prefixed with `/`, because it's probably looking for them at the absolute path of `/lib/core/common/` and not the relative path. ---
**Author:** ![guipinper](https://avatars.discourse-cdn.com/v4/letter/g/ce73a5/32.png) [@guipinper](https://forum.inductiveautomation.com/u/guipinper)\ **Post date:** [January 11, 2023, 6:13pm UTC](https://forum.inductiveautomation.com/t/issues-with-ignition-upgrade-7-9-to-8-1/68494/5 "2023-01-11T18:13:31Z")
It was right in front of me. It is working now. Thank you for the help! And apologies for not presenting a more challenging bug 😉