java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at sun.tools.java.Environment.error(Environment.java)
at sun.tools.java.Environment.error(Environment.java)
at sun.tools.java.Environment.error(Environment.java)
at sun.tools.java.OracleClassLocator.getHandle(OracleClassLocator.java)
at sun.tools.java.OracleClassLocator.getLocationEntry(OracleClassLocator.java)
at sun.tools.java.OracleClassLocator.getClassLocation(OracleClassLocator.java)
at sun.tools.java.OracleClassLocator.getClassLocation(OracleClassLocator.java)
at sun.tools.java.OracleClassLocator.getBinaryClassLocation(OracleClassLocator.java)
at sun.tools.java.OracleClassLocator.getBinaryClassLocation(OracleClassLocator.java)
at sun.tools.java.LocatorFinder.find(LocatorFinderFactory.java)
at oracle.aurora.compiler.SqljInterface$MyFinder.find(SqljInterface.java)
at oracle.aurora.compiler.MemoizedFinder.find(MemoizeFinder.java)
at oracle.aurora.compiler.CacheUsingFinders$Key.(CacheUsingFinders.java)
at oracle.aurora.compiler.CacheUsingFinders.get(CacheUsingFinders.java)
at oracle.aurora.compiler.CacheUsingFinders.get(CacheUsingFinders.java)
at sun.tools.javac.AuroraEnvironment.classExists(AuroraEnvironment.java)
at sun.tools.java.Environment.classExists(Environment.java)
at sun.tools.java.Environment.classExists(Environment.java)
at sun.tools.java.Environment.classExists(Environment.java)
at sun.tools.java.Environment.resolvePackageQualifiedName(Environment.java)
at sun.tools.java.ClassDefinition.resolveName(ClassDefinition.java)
at sun.tools.java.Environment.resolveNames(Environment.java)
at sun.tools.java.Environment.resolveNames(Environment.java)
at sun.tools.javac.SourceMember.resolveTypeStructure(SourceMember.java)
at sun.tools.javac.SourceClass.resolveTypeStructure(SourceClass.java)
at sun.tools.javac.SourceClass.basicCheck(SourceClass.java)
at oracle.aurora.jdkcompiler.JdkDriver.compile(JdkDriver.java)
at oracle.aurora.rdbms.Compiler.doCompile(Compiler.java)
at oracle.aurora.rdbms.Compiler.compile(Compiler.java)

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