diff --git a/core/org.eclipse.cdt.core/ChangeLog b/core/org.eclipse.cdt.core/ChangeLog
index 8d179b31e9a..2fdf93924b8 100644
--- a/core/org.eclipse.cdt.core/ChangeLog
+++ b/core/org.eclipse.cdt.core/ChangeLog
@@ -1,3 +1,13 @@
+2002-11-06 David Inglis
+	* index/org/eclipse/cdt/internal/core/index/CTagsRunner.java
+	fixed NPE when projects are deleted.
+	
+	* src/org/eclipse/cdt/core/ErrorParserManager.java
+	fixed NPE when file exits outside of workspace
+				
+	* utils/org/eclipse/cdt/utils/elf/Elf.java
+	fixed out of memory failure on bad elf files
+
 2002-11-06 Alain Magloire
 
 	Deal with some issues of PR 25756.
diff --git a/core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/index/CTagsRunner.java b/core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/index/CTagsRunner.java
index 2b6bfeadeae..89d9da4846c 100644
--- a/core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/index/CTagsRunner.java
+++ b/core/org.eclipse.cdt.core/index/org/eclipse/cdt/internal/core/index/CTagsRunner.java
@@ -13,6 +13,7 @@ import java.util.Map;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.IPath;
 
 import org.eclipse.cdt.core.index.ITagEntry;
 
@@ -52,9 +53,11 @@ public class CTagsRunner implements Runnable {
 							try {
 								CTagsCmd cmd = new CTagsCmd();
 								IFile file = (IFile)resource;
-								String location = file.getLocation().toOSString();
-								ITagEntry[] entries = cmd.getTagEntries(file, location);
-								filesMap.put(resource.getLocation(), entries);
+								IPath path = file.getLocation();
+								if (path != null) {
+									ITagEntry[] entries = cmd.getTagEntries(file, path.toOSString());
+									filesMap.put(resource.getLocation(), entries);
+								}
 							} catch (IOException e) {
 							}
 							//System.out.println("indexing " + resource.getName());
diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/ErrorParserManager.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/ErrorParserManager.java
index 7c72ea11903..37314898959 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/ErrorParserManager.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/ErrorParserManager.java
@@ -273,7 +273,7 @@ public class ErrorParserManager extends OutputStream {
 			path = (IPath) getWorkingDirectory().append(filePath);
 		}
 		IFile file = (path.isAbsolute()) ? fProject.getWorkspace().getRoot().getFileForLocation(path) : fProject.getFile(path);
-		return (file.exists()) ? file : null;
+		return (file != null && file.exists()) ? file : null;
 	}
 
 	protected class Problem {
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/Elf.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/Elf.java
index 9f51a1cd2ed..5bcda6d58d4 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/Elf.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/Elf.java
@@ -166,7 +166,7 @@ public class Elf {
 			try {
 				if ( section_strtab == null ) {
 					int size = (int)sections[ehdr.e_shstrndx].sh_size;
-					if ( size > efile.length() )
+					if ( size <= 0 || size > efile.length() )
 						return EMPTY_STRING;
 					section_strtab = new byte[size];
 					efile.seek(sections[ehdr.e_shstrndx].sh_offset);