diff --git a/Sources/PowerShell/SignalChartPwsh.cs b/Sources/PowerShell/SignalChartPwsh.cs
index 555c452..78c70bf 100644
--- a/Sources/PowerShell/SignalChartPwsh.cs
+++ b/Sources/PowerShell/SignalChartPwsh.cs
@@ -271,7 +271,11 @@ protected override void ProcessRecord()
             }
             else
             {
-                WriteObject("Values parameter cannot be null or empty.");
+                ThrowTerminatingError(new ErrorRecord(
+                    new ArgumentNullException(nameof(Values), "Values parameter cannot be null or empty."),
+                    "ValuesNullOrEmpty",
+                    ErrorCategory.InvalidArgument,
+                    nameof(Values)));
             }
         }
     }