After unzipping and rezipping the context with zip on Unix a folder called:
0 03-30-09 22:09 TUPELO-INF/
136726 03-30-09 17:12 TUPELO-INF/triples0.rdf
is created. When trying to load this zip file the following exception is thrown

java.lang.IllegalArgumentException: RDF does not permit relative URI refs: TUPELO-INF/
at org.tupeloproject.rdf.UriRef.validateUriString(UriRef.java:51)
at org.tupeloproject.rdf.UriRef.<init>(UriRef.java:43)
at org.tupeloproject.rdf.Resource.uriRef(Resource.java:46)
at org.tupeloproject.kernel.Contexts.load(Contexts.java:223)
at edu.uiuc.ncsa.cet.virtualsensorreset.VirtualSensorReset.initialize(VirtualSensorReset.java:447)
at edu.uiuc.ncsa.cet.virtualsensorreset.VirtualSensorReset.start(VirtualSensorReset.java:115)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)