Program crashes on start

[andrii-borzylo-pv]

I loaded JSON log file and have selected the JsonColumnizer.
After close it start to crash with NRE every start.

Object reference not set to an instance of an object.\n\n
NullReferenceException
   at LogExpert.Log4jXmlColumnizerConfig.FillDefaults(String[] columnNames)
   at LogExpert.Log4jXmlColumnizerConfig..ctor(String[] columnNames)
   at Void .ctor(System.String[])(Object[])
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObjectUsingCreatorWithParameters(JsonReader reader, JsonObjectContract contract, JsonProperty containerProperty, ObjectConstructor`1 creator, String id)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateNewObject(JsonReader reader, JsonObjectContract objectContract, JsonProperty containerMember, JsonProperty containerProperty, String id, Boolean& createdFromNonDefaultCreator)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
   at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType)
   at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value)
   at LogExpert.Log4jXmlColumnizer.LoadConfig(String configDir)
   at LogExpert.Classes.PluginRegistry.LoadPluginAssembly(String dllName, String interfaceName)
   at LogExpert.Classes.PluginRegistry.LoadPlugins()
   at LogExpert.Classes.PluginRegistry..ctor()
   at LogExpert.Classes.PluginRegistry.<>c.<.cctor>b__32_0()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at LogExpert.Classes.PluginRegistry.get_Instance()
   at LogExpert.Controls.LogWindow.LogWindow..ctor(LogTabWindow parent, String fileName, Boolean isTempFile, Boolean forcePersistenceLoading)
   at LogExpert.Controls.LogTabWindow.LogTabWindow.AddFileTab(String givenFileName, Boolean isTempFile, String title, Boolean forcePersistenceLoading, ILogLineColumnizer preProcessColumnizer, Boolean doNotAddToDockPanel)
   at LogExpert.Controls.LogTabWindow.LogTabWindow.OnLogTabWindowLoad(Object sender, EventArgs e)
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Control.CreateControl(Boolean ignoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)

[Hirogen]

Which version are you using?
Could you provide a test log file?

[Hirogen]

Are you sure you selected the json columnizer, because in the exception the "LogExpert.Log4jXmlColumnizer" is shown?

[andrii-borzylo-pv]

Which version are you using? Could you provide a test log file?

Sorry sure, the version is 1.12.0.0
It doesn't open any log files. The app is starting empty because the file that was opened last time was deleted.

Are you sure you selected the json columnizer, because in the exception the "LogExpert.Log4jXmlColumnizer" is shown?

This is the strange part. I remember switched once to the Xml and it have crashed with a similar message. But after that I switched back to Json. And after app restart I start getting this error constantly. And I tried to remove the XML plugin and managed to start the app normally. Then I tried to switch the columnizer to different options then close the app and return the XML plugin. And the error returns back despite the fact that XML plugin should not be selected.

I found some hint. If to delete the AppData/Roaming/LogExpert folder - the app start working. There is a file in this folder that I guess the reason of the crash:

log4jxmlcolumnizer.json

[Hirogen]

thanks for the log, I'll have a look

[andrii-borzylo-pv]

thanks for the log, I'll have a look

This is not a log file. This is file that LogExpert writes into USER/AppData/Roaming/LogExpert folder
After removing it - it stop crashing so possibly the reason is in some data containing here.
Try to drop it into the folder and see if it start crashing on your side.

[Hirogen]

This is the strange part. I remember switched once to the Xml and it have crashed with a similar message. But after that I switched back to Json. And after app restart I start getting this error constantly. And I tried to remove the XML plugin and managed to start the app normally. Then I tried to switch the columnizer to different options then close the app and return the XML plugin. And the error returns back despite the fact that XML plugin should not be selected.

I think there maybe a problem with the persister, but not sure, will move this to a later version, since it's not easily reproducible, and the workaround is to delete the json