what is the error “NullPointerException” ?

Hi,
I posted about deep learning and keras node erros before.
(Deep learning and keras errors )

I didn’t notice the latest reply so I can’t reply anymore.
So I am writing this posting again.

The problem was that the deep learning node works on some computers but not on certain computers.
I got this kinds of error message

ERROR Keras Network Learner 3:13 Execute failed: (“NullPointerException”): null

KNIME log is as follows.

2020-08-26 17:40:48,524 : ERROR : main : : WindowsDefenderExceptionHandler : : : PowerShell command powershell -inputformat none -outputformat text -NonInteractive -Command Get-MpComputerStatus -ErrorAction Stop | select -ExpandProperty AMServiceEnabled did not terminate successfully.
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : Stderr is:
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : Get-MpComputerStatus :
A generic error has occurred where the more specific error code does not apply.
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : Location Line:1 Character:1
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : + Get-MpComputerStatus -ErrorAction Stop | select -ExpandProperty AMSer …
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : + CategoryInfo : NotSpecified: (MSFT_MpComputerStatus:ROOT\Microsoft…pComputerStatus) [Get-MpComputerS
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : tatus], CimException
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : : + FullyQualifiedErrorId : HRESULT 0x800106ba,Get-MpComputerStatus
2020-08-26 17:40:48,527 : ERROR : main : : WindowsDefenderExceptionHandler : : :
2020-08-26 17:41:40,291 : WARN : ModalContext : : Node : Line Plot (local) : 0:18 : Some columns are ignored: bounds missing.
2020-08-26 17:41:46,197 : WARN : main : : Node : Line Plot (local) : 0:18 : Some columns are ignored: bounds missing.
2020-08-26 17:41:52,515 : ERROR : KNIME-Worker-6-Keras Network Learner 0:13 : : Node : Keras Network Learner : 0:13 : Execute failed: (“NullPointerException”): null
java.lang.NullPointerException
at org.knime.dl.keras.base.nodes.learner.DLKerasLearnerNodeModel.createLossFunctionMap(DLKerasLearnerNodeModel.java:896)
at org.knime.dl.keras.base.nodes.learner.DLKerasLearnerNodeModel.createTrainingConfig(DLKerasLearnerNodeModel.java:871)
at org.knime.dl.keras.base.nodes.learner.DLKerasLearnerNodeModel.executeInternal(DLKerasLearnerNodeModel.java:647)
at org.knime.dl.keras.base.nodes.learner.DLKerasLearnerNodeModel.execute(DLKerasLearnerNodeModel.java:303)
at org.knime.core.node.NodeModel.executeModel(NodeModel.java:576)
at org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1236)
at org.knime.core.node.Node.execute(Node.java:1016)
at org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:558)
at org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:95)
at org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:201)
at org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:117)
at org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:334)
at org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:210)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.knime.core.util.ThreadPool$MyFuture.run(ThreadPool.java:123)
at org.knime.core.util.ThreadPool$Worker.run(ThreadPool.java:246)

Duplicate: deep learning and keras node errors