Sterling Integrator Graphic Process Modeler not loading a process from Gentran Integration Suite 4.3 with missing gpl.

Symptom

Some business processes that are migrated from 4.3 to 5.0 via the export/import function are not loading correctly in the GPM.  The modeler doesn't error when loading but there are no objects displayed.  A new version of that business process will not load either.  New business processes created in SI 5.0 load fine in the GPM.  The console of the GPM does show some exceptions.

To turn on the console for the GPM follow this path from the command line of your client desktop or server (whichever system you are using to view the GPM):

javaws -viewer

Java Control Panel > Advanced > Settings > Java console > select Show Console

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: com/sterlingcommerce/woodstock/util/BaseUtil
            at com.sterlingcommerce.woodstock.gbm.common.lang.bpml.v0_3.base.FlowParser.parseFlow(FlowParser.java:127)
            at com.sterlingcommerce.woodstock.gbm.common.lang.bpml.v0_3.FlowParserWrapper.parseProcess(FlowParserWrapper.java:93)
            at com.sterlingcommerce.woodstock.gbm.editor.lang.bpml.v0_3.LangFileReader.readLangFile(LangFileReader.java:80)
            at com.sterlingcommerce.woodstock.gbm.common.ui.jgo.FlowDocument.handleLangFile(FlowDocument.java:866)
            at com.sterlingcommerce.woodstock.gbm.common.ui.jgo.FlowDocument.open(FlowDocument.java:818)
            at com.sterlingcommerce.woodstock.gbm.editor.jgo.FlowBuilderMain.openFlow(FlowBuilderMain.java:1187)
            at com.sterlingcommerce.woodstock.gbm.editor.jgo.FlowBuilderMain.openFlow(FlowBuilderMain.java:1112)
            at com.sterlingcommerce.woodstock.gbm.editor.jgo.BuildMenu.actionPerformed(BuildMenu.java:1380)
            at com.sterlingcommerce.woodstock.gbm.editor.jgo.actions.FlowAbstractAction.actionPerformed(FlowAbstractAction.java:171)
            at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
            at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
            at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
            at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
            at javax.swing.AbstractButton.doClick(Unknown Source)
            at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
            at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
            at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
            at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
            at java.awt.Component.processMouseEvent(Unknown Source)
            at javax.swing.JComponent.processMouseEvent(Unknown Source)
            at java.awt.Component.processEvent(Unknown Source)
            at java.awt.Container.processEvent(Unknown Source)
            at java.awt.Component.dispatchEventImpl(Unknown Source)
            at java.awt.Container.dispatchEventImpl(Unknown Source)
            at java.awt.Component.dispatchEvent(Unknown Source)
            at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
            at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
            at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
            at java.awt.Container.dispatchEventImpl(Unknown Source)
            at java.awt.Window.dispatchEventImpl(Unknown Source)
            at java.awt.Component.dispatchEvent(Unknown Source)
            at java.awt.EventQueue.dispatchEvent(Unknown Source)
            at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
            at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
            at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
            at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
            at java.awt.EventDispatchThread.run(Unknown Source)