Env

README.md

@@ -16,3 +16,13 @@ ln -s ../ip6/ip6 athena/ip6
 
 [VSCode documentation on container development](https://code.visualstudio.com/docs/remote/create-dev-container)
 
+
+### Troubleshooting: 
+
+1. If there is an error like: 
+
+    ```
+        Compact          ERROR ++ FAILED    to convert subdetector: B0Tracker: dd4hep: Evaluator::Object : unknown variable : B0Tracker_ID : value=B0Tracker_ID [Evaluation error]
+    ```
+
+    The most probably you've forgotten `ln -s ../ip6/ip6 athena/ip6`
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env.sh

+SCRIPT_DIR=''
+pushd "$(dirname "$(readlink -f "$BASH_SOURCE")")" > /dev/null && {
+    SCRIPT_DIR="$PWD"
+    popd > /dev/null
+}
+
+
+DD4HEP_LIBRARY_PATH="$SCRIPT_DIR/lib${DD4HEP_LIBRARY_PATH:+:${DD4HEP_LIBRARY_PATH}}"
+LD_LIBRARY_PATH="$SCRIPT_DIR/lib${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}"
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