Update NCIdlCompilerBase.scala
diff --git a/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala b/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala
index 1eac1bc..daccbdb 100644
--- a/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala
+++ b/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala
@@ -1042,7 +1042,7 @@
                 if (isList(v))
                     Z(asList(v).size(), n)
                 else if (isStr(v))
-                    Z(asStr(v), n)
+                    Z(asStr(v).length, n)
                 else
                     throw rtParamTypeError(fun, v, "string or list")
             })