diff --git a/java/org/slub/rosetta/dps/repository/plugin/SLUBRetroMonographieTIFFFormatValidationPlugin.java b/java/org/slub/rosetta/dps/repository/plugin/SLUBRetroMonographieTIFFFormatValidationPlugin.java
index 34739491bcf574beb658aaae437997898e1562fd..1caf7dcaa6ed0d70af16cfabc16476ab8a7bdfc9 100644
--- a/java/org/slub/rosetta/dps/repository/plugin/SLUBRetroMonographieTIFFFormatValidationPlugin.java
+++ b/java/org/slub/rosetta/dps/repository/plugin/SLUBRetroMonographieTIFFFormatValidationPlugin.java
@@ -128,7 +128,7 @@ public class SLUBRetroMonographieTIFFFormatValidationPlugin implements FormatVal
         InputStreamReader process_out;
         try {
             String execstring = this.checkit_tiff_binary_path.get(version) + " -q " + this.checkit_tiff_config_path.get(version) + " " + filePath ;
-            log.debug("executing: " + execstring);
+            log.info("executing: " + execstring);
             Process p = Runtime.getRuntime().exec(execstring);
             p.waitFor();
             process_out = new InputStreamReader(p.getInputStream());
@@ -143,9 +143,18 @@ public class SLUBRetroMonographieTIFFFormatValidationPlugin implements FormatVal
             while (line != null) {
                 System.out.println(line);
                 validationLog.add(line + System.lineSeparator());
+                log.info( line );
                 line = reader.readLine();
             }
             reader.close();
+            log.info(
+                    "file " + filePath + " is "
+                            + (is_checkit_tiff_valid.get(version) ? "valid" : "invalid")
+                            + " using checkit_tiff version " + version
+                            + " (binary: " + this.checkit_tiff_binary_path.get(version)
+                            + " profile: " + this.checkit_tiff_config_path.get(version)
+                            + " )"
+            );
         } catch (IOException e) {
             log.error("ERROR: ("+version.name()+") checkit_tiff not available, path=" + this.checkit_tiff_binary_path.get(version) + ", " + e.getMessage());
         } catch (InterruptedException e) {
@@ -235,7 +244,7 @@ public class SLUBRetroMonographieTIFFFormatValidationPlugin implements FormatVal
     private void checkFileExists (String filename) throws Exception {
         File f = new File(filename);
         if (! f.exists() ) {
-            System.out.println("ERROR: path=" + filename + " not available");
+            log.error("path=" + filename + " not available");
             throw new Exception("ERROR: path=" + filename + " not available");
         }
     }