diff --git a/src/ffx/ffx_controller.py b/src/ffx/ffx_controller.py
index 4d78ae6..659e9f1 100644
--- a/src/ffx/ffx_controller.py
+++ b/src/ffx/ffx_controller.py
@@ -109,6 +109,9 @@ class FfxController():
 
 
     def generateOutputTokens(self, filePathBase, format = '', ext = ''):
+
+        self.__logger.debug(f"FfxController.generateOutputTokens(): base={filePathBase} format={format} ext={ext}")
+
         outputFilePath = f"{filePathBase}{'.'+str(ext) if ext else ''}"
         if format:
             return ['-f', format, outputFilePath]