diff --git a/src/libslic3r/utils.cpp b/src/libslic3r/utils.cpp
index 1ac45f1b5..719d2f6fb 100644
--- a/src/libslic3r/utils.cpp
+++ b/src/libslic3r/utils.cpp
@@ -443,6 +443,8 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
 	ec.clear();
   	int err = 0;
 
+  	BOOST_LOG_TRIVIAL(trace) << "copy_file_linux("<<from<<", "<<to<< ")";
+
   	// Note: Declare fd_wrappers here so that errno is not clobbered by close() that may be called in fd_wrapper destructors
   	fd_wrapper infile, outfile;
 
@@ -458,6 +460,8 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
     	}
     	break;
   	}
+  	BOOST_LOG_TRIVIAL(trace) << "infile.fd";
+
 
 	struct ::stat from_stat;
 	if (::fstat(infile.fd, &from_stat) != 0) {
@@ -465,6 +469,8 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
 		err = errno;
 		goto fail;
 	}
+	
+	BOOST_LOG_TRIVIAL(trace) << "from_stat";
 
   	const mode_t from_mode = from_stat.st_mode;
   	if (!S_ISREG(from_mode)) {
@@ -472,6 +478,8 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
     	goto fail;
   	}
 
+	BOOST_LOG_TRIVIAL(trace) << "from_mode";
+
   	// Enable writing for the newly created files. Having write permission set is important e.g. for NFS,
   	// which checks the file permission on the server, even if the client's file descriptor supports writing.
   	mode_t to_mode = from_mode | S_IWUSR;
@@ -487,22 +495,29 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
 	  	}
 	  	break;
 	}
+	BOOST_LOG_TRIVIAL(trace) << "outfile.fd";
 
 	struct ::stat to_stat;
 	if (::fstat(outfile.fd, &to_stat) != 0)
 		goto fail_errno;
 
+	BOOST_LOG_TRIVIAL(trace) << "to_stat";
+
 	to_mode = to_stat.st_mode;
 	if (!S_ISREG(to_mode)) {
 		err = ENOSYS;
 		goto fail;
 	}
 
+	BOOST_LOG_TRIVIAL(trace) << "to_mode";
+
 	if (from_stat.st_dev == to_stat.st_dev && from_stat.st_ino == to_stat.st_ino) {
 		err = EEXIST;
 		goto fail;
 	}
 
+	BOOST_LOG_TRIVIAL(trace) << "from / to compare";
+
 	//! copy_file implementation that uses sendfile loop. Requires sendfile to support file descriptors.
 	//FIXME Vojtech: This is a copy loop valid for Linux 2.6.33 and newer.
 	// copy_file_data_copy_file_range() supports cross-filesystem copying since 5.3, but Vojtech did not want to polute this
@@ -530,6 +545,8 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
 		}
 	}
 
+	BOOST_LOG_TRIVIAL(trace) << "sendfile loop";
+
 	// If we created a new file with an explicitly added S_IWUSR permission,
 	// we may need to update its mode bits to match the source file.
 	if (to_mode != from_mode && ::fchmod(outfile.fd, from_mode) != 0) {
@@ -553,6 +570,8 @@ bool copy_file_linux(const boost::filesystem::path &from, const boost::filesyste
 	if (err != 0)
 		goto fail_errno;
 
+	BOOST_LOG_TRIVIAL(trace) << "copy_file_linux success";
+
 	return true;
 }
 #endif // __linux__