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java.lang.NullPointerException: null at eu.cloudopting.bpmn.tasks.publish.update.UpdateToscaFile.execute(UpdateToscaFile.java:74)[classes/:na] at org.activiti.engine.impl.delegate.JavaDelegateInvocation.invoke(JavaDelegateInvocation.java:34)[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37)[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25)[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.bpmn.behavior.ServiceTaskDelegateExpressionActivityBehavior.execute(ServiceTaskDelegateExpressionActivityBehavior.java:101)[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60)[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)[activiti-engine-5.19.0.2.jar:5.19.0.2]