diff --git a/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java b/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
index bab6fba..d0da96e 100644
--- a/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
+++ b/brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
@@ -805,10 +805,9 @@ public abstract class BExpressionContext implements IByteArrayUnifier {
       for (int i = 0; i < minWriteIdx; i++) {
         variableData[i] = readOnlyData[i];
       }
+    } catch (IllegalArgumentException e) {
+      throw new IllegalArgumentException("ParseException " + file + " at line " + linenr + ": " + e.getMessage());
     } catch (Exception e) {
-      if (e instanceof IllegalArgumentException) {
-        throw new IllegalArgumentException("ParseException " + file + " at line " + linenr + ": " + e.getMessage());
-      }
       throw new RuntimeException(e);
     }
     if (expressionList.size() == 0) {
diff --git a/config/pmd/pmd-ruleset.xml b/config/pmd/pmd-ruleset.xml
index f2cdcf9..775d7fe 100644
--- a/config/pmd/pmd-ruleset.xml
+++ b/config/pmd/pmd-ruleset.xml
@@ -14,7 +14,6 @@
         <exclude name="AssignmentToNonFinalStatic" />
         <exclude name="AvoidBranchingStatementAsLastInLoop" />
         <exclude name="AvoidCatchingThrowable" />
-        <exclude name="AvoidInstanceofChecksInCatchClause" />
         <exclude name="AvoidProtectedFieldInFinalClass" />
         <exclude name="AvoidUsingVolatile" />
         <exclude name="CloseResource" />