TIBCO Spotfire File Writer

KNIME Extensions
1

Hi
A few days ago it worked out very well, but today I can’t write a sbdf-file to the spotfire library. The node say’s “Executing - Writing TIBCO Spotfire file: …sbdf - Transfer file created” The temporarily created file works well in Spotfire, but the node doesn’t load it into the library. It doesn’t matter if I execute it localy or on the Knime server.
The knime.log says nothing while running, only when I cancel the writer node:

2019-10-01 12:36:05,229 : WARN  : KNIME-Worker-30 :  : SpotfireFileWriterNodeModel : TIBCO Spotfire File Writer : 0:631 : Error uploading to library: null ... Retry number: 0
java.lang.InterruptedException
	at java.lang.ProcessImpl.waitFor(ProcessImpl.java:451)
	at com.tibco.ext.spotfire.filewriter.node.SpotfireFileWriterNodeModel.oopUploadToLibrary(SpotfireFileWriterNodeModel.java:482)
	at com.tibco.ext.spotfire.filewriter.node.SpotfireFileWriterNodeModel.uploadToLibrary(SpotfireFileWriterNodeModel.java:340)
	at com.tibco.ext.spotfire.filewriter.node.SpotfireFileWriterNodeModel.execute(SpotfireFileWriterNodeModel.java:180)
	at org.knime.core.node.NodeModel.execute(NodeModel.java:733)
	at org.knime.core.node.NodeModel.executeModel(NodeModel.java:567)
	at org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1192)
	at org.knime.core.node.Node.execute(Node.java:979)
	at org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:559)
	at org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:95)
	at org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:179)
	at org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:110)
	at org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:328)
	at org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:204)
	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)
2019-10-01 12:36:06,231 : WARN  : KNIME-Worker-30 :  : Node : TIBCO Spotfire File Writer : 0:631 : Execution canceled

May anybody help me?

Thank you.

BTW: the temp-file has 150MB.