# Error Launching java.lang.NullPointerException **URL:** \ **Category:** Ignition\ **Tags:** ignition80\ **Created:** [December 14, 2020, 7:14am UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491 "2020-12-14T07:14:06Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Apisit\_Chuencharoen](https://avatars.discourse-cdn.com/v4/letter/a/9d8465/32.png) [@Apisit\_Chuencharoen](https://forum.inductiveautomation.com/u/Apisit_Chuencharoen)\ **Post date:** [December 14, 2020, 7:14am UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491/1 "2020-12-14T07:14:06Z")
Hello, One of our user cannot launch Ignition Vision client but he can launch Ignition designer. Error is java.lang.NullPointerException (as pitctured below). We try to uninstall and re-install Ignition vision client but it still no good. Could you please kindly suggest us to solve this problem? Ignition version: 8.0.16 OS: Windows ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/d/3d6b19661f0a43a33bcfbabdcd1f34b72837d2bc.png) ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [December 14, 2020, 3:56pm UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491/2 "2020-12-14T15:56:47Z")
Check for a `visionclientlauncher.log` file in the `%USERPROFILE%/.ignition/clientlauncher-data/` folder - you may directly see the error there, or else you can take the command line string and launch it yourself, which should give you details about the NPE. EG, copy and paste the command from: ```auto INFO [LaunchUtil] [2020/01/14 11:03:21]: Starting Java with the following parameters: C:\Users\pgriffith\AppData\Roaming\Inductive Automation\Vision Client Launcher\jre\bin\java.exe -classpath C:\Users\pgriffith\.ignition\clientlauncher-data\launchclient.jar -Djavaws.sr.gateway.addr.0=http://10.10.70.73:9800 -Djavaws.sr.launchts=1579028601881 -Djavaws.sr.main=com.inductiveautomation.factorypmi.application.runtime.ClientLaunchHook -Djavaws.sr.platform.edition= -Xms32M -Xmx256M -Djavaws.sr.memory.init=32M -Djavaws.sr.memory.max=256M -Dsun.java2d.d3d=false -Dsun.java2d.noddraw=false -Djavaws.sr.screen=0 -Djavaws.sr.scope=C -Djavaws.sr.project=test com.inductiveautomation.ignition.client.launch.BootstrapSwing ``` Then paste the NPE’s stack trace here. And/or, get in contact with support. ---
**Author:** ![Hoa\_Pham](https://avatars.discourse-cdn.com/v4/letter/h/2acd7d/32.png) [@Hoa\_Pham](https://forum.inductiveautomation.com/u/Hoa_Pham)\ **Post date:** [December 22, 2021, 2:37pm UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491/3 "2021-12-22T14:37:09Z")
Hello, I had a same problem here. It seems I added an event script or something during runtime, I closed project without saving it (both designer launcher and vision client launcher). Then I am not be able to open designer launcher again. it stucks there. I can not get into the designer software to delete events script there. Any chance that I can reset it by cmd line? Here are error logs ```auto INFO [ClientLauncher] [2021/12/22 17:21:41]: Set initial logging level to INFO INFO [ClientLauncher] [2021/12/22 17:21:42]: Updating logging level to INFO ERROR [RuntimeException] [2021/12/22 17:21:42]: Uncaught exception in thread: main java.lang.RuntimeException: Exception in Application init method at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:895) at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: java.lang.NullPointerException at com.inductiveautomation.ignition.launcher.common.ui.base.BaseLauncherApplication.lambda$init$0(BaseLauncherApplication.java:134) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at com.inductiveautomation.ignition.launcher.common.ui.base.BaseLauncherApplication.init(BaseLauncherApplication.java:132) at com.inductiveautomation.ignition.launcher.client.ui.VisionLauncherApplication.init(VisionLauncherApplication.java:114) at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:824) ... 2 more ``` ```auto INFO [DesignerLauncher] [2021/12/22 21:20:57]: Set initial logging level to INFO INFO [DesignerLauncher] [2021/12/22 21:20:57]: Updating logging level to INFO ERROR [RuntimeException] [2021/12/22 21:20:57]: Uncaught exception in thread: main java.lang.RuntimeException: Exception in Application init method at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:895) at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: java.lang.NullPointerException at com.inductiveautomation.ignition.launcher.common.ui.base.BaseLauncherApplication.lambda$init$0(BaseLauncherApplication.java:134) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at com.inductiveautomation.ignition.launcher.common.ui.base.BaseLauncherApplication.init(BaseLauncherApplication.java:132) at com.inductiveautomation.ignition.launcher.designer.ui.DesignerLauncherApplication.init(DesignerLauncherApplication.java:122) at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:824) ... 2 more ``` ---
**Author:** ![kcollins](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kcollins/32/19646_2.png) [@kcollins](https://forum.inductiveautomation.com/u/kcollins)\ **Post date:** [December 22, 2021, 4:07pm UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491/4 "2021-12-22T16:07:45Z")
Can you share the contents of your `~/.ignition/clientlauncher-data/designer-launcher.json` (only need the entry for your target connection, perhaps with any address data masked out)? I want to make sure that you have the `gateway.info` object in your configuration… ---
**Author:** ![Hoa\_Pham](https://avatars.discourse-cdn.com/v4/letter/h/2acd7d/32.png) [@Hoa\_Pham](https://forum.inductiveautomation.com/u/Hoa_Pham)\ **Post date:** [December 27, 2021, 2:13am UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491/5 "2021-12-27T02:13:01Z")
I can not upload a file .json please have a look at lines below ```auto { "global": { "client.defaults": { "timeout": 30, "retries": -1, "init.heap": null, "max.heap": null, "use.custom.jre": false, "custom.jre.path": "${JAVA_HOME}/bin/java", "jvm.arguments": [ "" ], "client.tag.overrides": {} }, "autoexit": false, "default.application": "", "multicast.address": "231.1.1.1", "multicast.receive.port": 4446, "lock.configuration": false, "logger.level": "INFO", "version.updates.prompt": true, "version.updates.revision.diff": 3 }, "applications": [ { "main.class": "com.inductiveautomation.ignition.designer.DesignerStartupHook", "window.mode": null, "timeout": 30, "screen": null, "retries": -1, "init.heap": null, "max.heap": null, "sun.java2d.d3d": null, "sun.java2d.noddraw": null, "jvm.arguments": [], "client.tag.overrides": {}, "fallback.application": "", "use.custom.jre": false, "custom.jre.path": "${JAVA_HOME}/bin/java", "name": "Ignition-DESKTOP-0K7459Q", "description": null, "gateway.info": { "gateway.name": "Ignition-DESKTOP-0K7459Q", "gateway.address": "http://localhost:8088", "redundant.gateways": [] }, "last.updated": 1639966912173, "image.path": null, "favorite": false }, { "main.class": null, "window.mode": null, "timeout": null, "screen": null, "retries": null, "init.heap": null, "max.heap": null, "sun.java2d.d3d": null, "sun.java2d.noddraw": null, "jvm.arguments": null, "client.tag.overrides": null, "fallback.application": null, "use.custom.jre": null, "custom.jre.path": null, "name": null, "description": "A Demo project showcasing most of Ignition's features: realtime status & control, historical trending, UDTs & templates, reporting, alarming, security, and more. To login as an Administrator use admin/password as the username/password. To login as an operator use operator/password. Operators have less privileges.", "gateway.info": null, "last.updated": 1640166361442, "image.path": null, "favorite": false } ] } ``` ---
**Author:** ![Kevin.Collins](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.collins/32/13497_2.png) [@Kevin.Collins](https://forum.inductiveautomation.com/u/Kevin.Collins)\ **Post date:** [December 28, 2021, 12:08am UTC](https://forum.inductiveautomation.com/t/error-launching-java-lang-nullpointerexception/41491/6 "2021-12-28T00:08:33Z")
> [@Hoa\_Pham](#): > > ```auto > , > { > "main.class": null, > "window.mode": null, > "timeout": null, > "screen": null, > "retries": null, > "init.heap": null, > "max.heap": null, > "sun.java2d.d3d": null, > "sun.java2d.noddraw": null, > "jvm.arguments": null, > "client.tag.overrides": null, > "fallback.application": null, > "use.custom.jre": null, > "custom.jre.path": null, > "name": null, > "description": "A Demo project showcasing most of Ignition's features: realtime status & control, historical trending, UDTs & templates, reporting, alarming, security, and more. To login as an Administrator use admin/password as the username/password. To login as an operator use operator/password. Operators have less privileges.", > "gateway.info": null, > "last.updated": 1640166361442, > "image.path": null, > "favorite": false > } > > ``` I'd try removing this last object from your JSON config where `gateway.info` is _null_.