Improve error message when parameter value is missing

yadnyeshwar · yadnyeshwar · commit 5bf6790e63fb · 2026-03-12T09:15:36.000Z
Signed-off-by: yadnyeshwar &lt;yadnyeshwarasakhare@gmail.com&gt;
diff --git a/rclcpp/src/rclcpp/parameter_map.cpp b/rclcpp/src/rclcpp/parameter_map.cpp
@@ -152,7 +152,7 @@ rclcpp::parameter_value_from(const rcl_variant_t * const c_param_value)
     return ParameterValue(strings);
   }
 
-  throw InvalidParameterValueException("No parameter value set");
+  throw InvalidParameterValueException("Invalid parameter value: rcl parameter strucure contains no value");
 }
 
 ParameterMap

Original file line number	Diff line number	Diff line change
`@@ -152,7 +152,7 @@ rclcpp::parameter_value_from(const rcl_variant_t * const c_param_value)`
`152`	`152`	`return ParameterValue(strings);`
`153`	`153`	`}`
`154`	`154`
`155`		`- throw InvalidParameterValueException("No parameter value set");`
	`155`	`+ throw InvalidParameterValueException("Invalid parameter value: rcl parameter strucure contains no value");`
`156`	`156`	`}`
`157`	`157`
`158`	`158`	`ParameterMap`