SvH@sar-ccd:~$ /opt/s1tbx-snap2.0/bin/gpt -e /sar-out/sasol/processing/20151130T153026/20151130T153026_20151129_20151117_2_COC_NESTGRAPH_3.xml
java.lang.IllegalArgumentException: The Product 'S1A_IW1_SLC__1SDV_20151129T161422_20151129T161449_008821_00C969_8CA5_VHBandMath' already contains a tie-point grid with the name 'latitude'.
        at org.esa.snap.core.datamodel.Product.addTiePointGrid(Product.java:1055)
        at org.esa.snap.core.util.ProductUtils.copyTiePointGrids(ProductUtils.java:1148)
        at org.esa.snap.core.gpf.common.BandMathsOp.initialize(BandMathsOp.java:282)
        at org.esa.snap.core.gpf.internal.OperatorContext.initializeOperator(OperatorContext.java:499)
        at org.esa.snap.core.gpf.internal.OperatorContext.getTargetProduct(OperatorContext.java:278)
        at org.esa.snap.core.gpf.Operator.getTargetProduct(Operator.java:359)
        at org.esa.snap.core.gpf.graph.NodeContext.initTargetProduct(NodeContext.java:74)
        at org.esa.snap.core.gpf.graph.GraphContext.initNodeContext(GraphContext.java:195)
        at org.esa.snap.core.gpf.graph.GraphContext.initNodeContext(GraphContext.java:178)
        at org.esa.snap.core.gpf.graph.GraphContext.initOutput(GraphContext.java:162)
        at org.esa.snap.core.gpf.graph.GraphContext.<init>(GraphContext.java:91)
        at org.esa.snap.core.gpf.graph.GraphContext.<init>(GraphContext.java:64)
        at org.esa.snap.core.gpf.graph.GraphProcessor.executeGraph(GraphProcessor.java:130)
        at org.esa.snap.core.gpf.main.DefaultCommandLineContext.executeGraph(DefaultCommandLineContext.java:84)
        at org.esa.snap.core.gpf.main.CommandLineTool.executeGraph(CommandLineTool.java:502)
        at org.esa.snap.core.gpf.main.CommandLineTool.runGraph(CommandLineTool.java:350)
        at org.esa.snap.core.gpf.main.CommandLineTool.runGraphOrOperator(CommandLineTool.java:249)
        at org.esa.snap.core.gpf.main.CommandLineTool.run(CommandLineTool.java:150)
        at org.esa.snap.core.gpf.main.CommandLineTool.run(CommandLineTool.java:122)
        at org.esa.snap.core.gpf.main.GPT.run(GPT.java:54)
        at org.esa.snap.core.gpf.main.GPT.main(GPT.java:34)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.esa.snap.runtime.Launcher.lambda$run$1(Launcher.java:55)
        at org.esa.snap.runtime.Engine.runClientCode(Engine.java:186)
        at org.esa.snap.runtime.Launcher.run(Launcher.java:51)
        at org.esa.snap.runtime.Launcher.main(Launcher.java:31)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:62)
        at com.install4j.runtime.launcher.UnixLauncher.main(UnixLauncher.java:57)

Error: The Product 'S1A_IW1_SLC__1SDV_20151129T161422_20151129T161449_008821_00C969_8CA5_VHBandMath' already contains a tie-point grid with the name 'latitude'.