Thanks for your reply.This problem has been bothering me for days.
Specific problems：I encountered this exception after starting SNAP (before any operations).
java.util.ServiceConfigurationError: javax.xml.stream.XMLInputFactory: Provider com.ctc.wstx.stax.WstxInputFactory not found
at java.util.ServiceLoader.fail(ServiceLoader.java:239)
at java.util.ServiceLoader.access$300(ServiceLoader.java:185)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:372)
at java.util.ServiceLoader$LazyIterator.access$700(ServiceLoader.java:323)
at java.util.ServiceLoader$LazyIterator$2.run(ServiceLoader.java:407)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:409)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at javax.xml.stream.FactoryFinder$1.run(FactoryFinder.java:353)
at java.security.AccessController.doPrivileged(Native Method)
at javax.xml.stream.FactoryFinder.findServiceProvider(FactoryFinder.java:341)
Caused: java.lang.RuntimeException: Provider for class javax.xml.stream.XMLInputFactory cannot be created
at javax.xml.stream.FactoryFinder.findServiceProvider(FactoryFinder.java:367)
Caused: javax.xml.stream.FactoryConfigurationError: Provider for class javax.xml.stream.XMLInputFactory cannot be created
at javax.xml.stream.FactoryFinder.findServiceProvider(FactoryFinder.java:370)
at javax.xml.stream.FactoryFinder.find(FactoryFinder.java:313)
at javax.xml.stream.FactoryFinder.find(FactoryFinder.java:227)
at javax.xml.stream.XMLInputFactory.newInstance(XMLInputFactory.java:154)
at gov.nasa.worldwind.util.WWXML.openEventReaderStream(WWXML.java:353)
at gov.nasa.worldwind.util.WWXML.openEventReader(WWXML.java:502)
at gov.nasa.worldwind.util.WWXML.openEventReader(WWXML.java:464)
at gov.nasa.worldwind.ogc.OGCCapabilities.createReader(OGCCapabilities.java:89)
at gov.nasa.worldwind.ogc.OGCCapabilities.(OGCCapabilities.java:70)
at gov.nasa.worldwind.ogc.wms.WMSCapabilities.(WMSCapabilities.java:71)
at gov.nasa.worldwind.util.SessionCacheRetrievalPostProcessor.handleWMSCapabilitiesContent(SessionCacheRetrievalPostProcessor.java:248)
at gov.nasa.worldwind.util.SessionCacheRetrievalPostProcessor.handleContent(SessionCacheRetrievalPostProcessor.java:238)
at gov.nasa.worldwind.util.SessionCacheRetrievalPostProcessor.onRetrievalSuceeded(SessionCacheRetrievalPostProcessor.java:193)
at gov.nasa.worldwind.util.SessionCacheRetrievalPostProcessor.run(SessionCacheRetrievalPostProcessor.java:177)
at gov.nasa.worldwind.retrieve.URLRetriever.end(URLRetriever.java:352)
at gov.nasa.worldwind.retrieve.URLRetriever.call(URLRetriever.java:280)
at gov.nasa.worldwind.retrieve.URLRetriever.call(URLRetriever.java:27)
at gov.nasa.worldwind.util.SessionCacheUtils.retrieveSessionData(SessionCacheUtils.java:80)
at gov.nasa.worldwind.util.SessionCacheUtils.getOrRetrieveSessionCapabilities(SessionCacheUtils.java:170)
at gov.nasa.worldwind.layers.BasicTiledImageLayer.retrieveResources(BasicTiledImageLayer.java:723)
at gov.nasa.worldwind.layers.BasicTiledImageLayer$2.run(BasicTiledImageLayer.java:811)
[catch] at java.lang.Thread.run(Thread.java:748)
That’s why @gnwiii said sometimes the world view is empty. You can ignore this error as long your world view is working. Nothing else should be affected. This issue has been reported before: After update: Provider com.ctc.wstx.stax.WstxInputFactory not found - snap / Problem Reports - STEP Forum …
I am having the same problem as was reported here: Offset Tracking (ERS)
I have successfully applied the orbit files and DEM-assisted co-registration. When I attempt to run offset tracking on the co-registered stack, I get the error message “A problem occurred during the target product initialisation.
Type: OperatorException
Message: java.lang.NullPointerException”
java.lang.NullPointerException
at org.esa.s1tbx.insar.gpf.OffsetTrackingOp.getSourceBand(OffsetTrackingOp.java:299)
at org.esa.s1tbx.insar.gpf.OffsetTrackingOp.getMasterSlaveBands(OffsetTrackingOp.java:280)
at org.esa.s1tbx.insar.gpf.OffsetTrackingOp.initialize(OffsetTrackingOp.java:229)
Caused: org.esa.snap.core.gpf.OperatorException
at org.esa.snap.engine_utilities.gpf.OperatorUtils.catchOperatorException(OperatorUtils.java:432)
at org.esa.s1tbx.insar.gpf.OffsetTrackingOp.initialize(OffsetTrackingOp.java:240)
at org.esa.snap.core.gpf.internal.OperatorContext.initializeOperator(OperatorContext.java:528)
at org.esa.snap.core.gpf.internal.OperatorContext.getTargetProduct(OperatorContext.java:298)
at org.esa.snap.core.gpf.Operator.getTargetProduct(Operator.java:385)
at org.esa.snap.core.gpf.GPF.createProductNS(GPF.java:333)
at org.esa.snap.core.gpf.GPF.createProduct(GPF.java:308)
at org.esa.snap.core.gpf.GPF.createProduct(GPF.java:287)
at org.esa.snap.graphbuilder.rcp.dialogs.SingleOperatorDialog.createTargetProduct(SingleOperatorDialog.java:175)
[catch] at org.esa.snap.graphbuilder.rcp.dialogs.SingleOperatorDialog.onApply(SingleOperatorDialog.java:287)
at org.esa.snap.ui.AbstractDialog.lambda$initUI$6(AbstractDialog.java:519)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
I think these two problems are related, but I don’t know how to solve them. Could you please help me？
