diff --git a/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs b/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs
index 9d8edec..c93def6 100644
--- a/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs
+++ b/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs
@@ -228,7 +228,7 @@ private IControlRecord CreateControlRecord(ScriptParam p, string? value, int ind
                     }
                 };
             case PromptType.FileContent:
-                if (Path.IsPathRooted(value) == false)
+                if (string.IsNullOrWhiteSpace(value) == false && Path.IsPathRooted(value) == false)
                 {
                     value = Path.GetFullPath(value, scriptConfig.WorkingDirectory);
                 }
@@ -247,7 +247,7 @@ private IControlRecord CreateControlRecord(ScriptParam p, string? value, int ind
                 };
             case PromptType.FilePicker:
 
-                if (Path.IsPathRooted(value) == false)
+                if (string.IsNullOrWhiteSpace(value)== false && Path.IsPathRooted(value) == false)
                 {
                     value = Path.GetFullPath(value, scriptConfig.WorkingDirectory);
                 }
@@ -263,7 +263,7 @@ private IControlRecord CreateControlRecord(ScriptParam p, string? value, int ind
                     }
                 };
             case PromptType.DirectoryPicker:
-                if (Path.IsPathRooted(value) == false)
+                if (string.IsNullOrWhiteSpace(value)== false && Path.IsPathRooted(value) == false)
                 {
                     value = Path.GetFullPath(value, scriptConfig.WorkingDirectory);
                 }