diff --git a/DEVELOPER.md b/DEVELOPER.md
new file mode 100644
index 0000000..850d5bb
--- /dev/null
+++ b/DEVELOPER.md
@@ -0,0 +1,43 @@
+
+# Developer notes
+
+## Development
+
+### installing tools needed
+
+TODO some commands/packages
+
+### build
+
+TODO command
+
+### run tests locally
+
+TODO command
+
+### testing plugin in eclipse
+
+TODO write description
+
+## release process
+
+### version
+
+ * Update version in the files see f260c53
+   TODO right now this is done manually can it be done more automated?
+ * create a tag in the repo
+ * create a release in github
+
+### updating files
+
+download artifact "cppcheclipse-repository" from the github action "Java CI"
+unzip the artifact and upload files to https://files.cppchecksolutions.com/cppcheclipse/ folder
+
+### publish plugin in marketplace
+
+to make sure that proper version info etc is shown in marketplace.
+https://marketplace.eclipse.org
+login
+goto cppcheclipse plugin
+click on "Edit" button at the top
+Add version
diff --git a/com.googlecode.cppcheclipse.ui/src/com/googlecode/cppcheclipse/ui/ToolchainSettings.java b/com.googlecode.cppcheclipse.ui/src/com/googlecode/cppcheclipse/ui/ToolchainSettings.java
index 461edb7..34550f8 100644
--- a/com.googlecode.cppcheclipse.ui/src/com/googlecode/cppcheclipse/ui/ToolchainSettings.java
+++ b/com.googlecode.cppcheclipse.ui/src/com/googlecode/cppcheclipse/ui/ToolchainSettings.java
@@ -179,7 +179,12 @@ protected Collection<File> getIncludes(boolean onlyUserDefined) {
 					if (includePathSetting instanceof ACPathEntry) {
 						// let CDT do the resolution for all ACPathEntries which should cover all include settings
 						ACPathEntry includePathEntry = (ACPathEntry) includePathSetting;
-						includePath = includePathEntry.getLocation().toFile();
+						IPath location = includePathEntry.getLocation();
+					    if (location == null) {
+					        continue;
+					    }
+
+					    includePath = location.toFile();
 					} else {
 
 						// make path absolute