Icy Version 1.6.1.1
Java(TM) SE Runtime Environment 1.8.0_45-b15 (64 bit)
Running on Windows 7 6.1 (amd64)
Max java memory : 111.1 GB

Plugin Workbooks 3.0.0.0

Dependances:
Plugin Protocols SDK 4.5.4.0 is correctly installed
Plugin EzPlug SDK 3.9.6.0 is correctly installed

Comment:
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java.lang.RuntimeException: java.lang.NullPointerException
at plugins.adufour.blocks.tools.io.WorkbookToFile.saveAsSpreadSheet(WorkbookToFile.java:130)
at plugins.adufour.blocks.tools.io.WorkbookToFile.run(WorkbookToFile.java:68)
at plugins.adufour.blocks.lang.BlockDescriptor.run(BlockDescriptor.java:540)
at plugins.adufour.blocks.lang.WorkFlow.run(WorkFlow.java:832)
at plugins.adufour.blocks.lang.BlockDescriptor.run(BlockDescriptor.java:540)
at java.lang.Thread.run(Unknown Source)
Caused by :
java.lang.NullPointerException