modify error message

Author: AndreasGocht

scorep/subsystem.py

@@ -128,7 +128,9 @@ def init_environment(scorep_config, keep_files=False, verbose=False):
     if not os.access(temp_dir + "/" + subsystem_lib_name, os.X_OK):
         clean_up(keep_files=keep_files)
         raise RuntimeError(
-            "The Score-P Subsystem Library at {} cannot be executed. Cleaning up.".format(temp_dir + "/" + subsystem_lib_name))
+            "The Score-P Subsystem Library at {} cannot be executed. Changing $TMP might help. "
+            "Directory erased, use --keep-files to inspect the situation.".format(
+                temp_dir + "/" + subsystem_lib_name))
 
     scorep.helper.add_to_ld_library_path(temp_dir)