diff --git a/src/main/java/cokr/xit/interfaces/lntris/InterfaceInfoReader.java b/src/main/java/cokr/xit/interfaces/lntris/InterfaceInfoReader.java
index f1b1706..f3b935f 100644
--- a/src/main/java/cokr/xit/interfaces/lntris/InterfaceInfoReader.java
+++ b/src/main/java/cokr/xit/interfaces/lntris/InterfaceInfoReader.java
@@ -105,7 +105,10 @@ public abstract class InterfaceInfoReader<T extends InterfaceInfo<?, ?>> extends
 			},
 			receiptCount()
 		);
-		if (paths.isEmpty()) return Collections.emptyList();
+		if (paths.isEmpty()) {
+			log().debug("No files found to process");
+			return Collections.emptyList();
+		}
 
 		List<FileStatus> fileStatus = paths.stream()
 			.map(path -> {
@@ -131,9 +134,13 @@ public abstract class InterfaceInfoReader<T extends InterfaceInfo<?, ?>> extends
 		Map<Boolean, List<FileStatus>> successFail = fileStatus.stream() //처리 결과를 성공 / 실패로 분류
 			.collect(Collectors.groupingBy(FileStatus::isSuccess));
 
-		List<FileStatus> success = successFail.get(true);
+		List<FileStatus>
+			success = successFail.get(true),
+			fail = successFail.get(false);
+		log().debug("success: {}, fail: {}", !isEmpty(success) ? success.size() : 0, !isEmpty(fail) ? fail.size() : 0);
+
 		move(FileStatus.getPaths(success), successDir()); // 성공 디렉토리로 이동
-		move(FileStatus.getPaths(successFail.get(false)), failDir()); // 실패 디렉토리로 이동
+		move(FileStatus.getPaths(fail), failDir()); // 실패 디렉토리로 이동
 
 		return isEmpty(success) ?
 			Collections.emptyList() :