json: Improve the "processes in module" message a bit.

diff --git a/backends/json/json.cc b/backends/json/json.cc
index b13105f64a75230ad0bf7cc26d8fbdca75e65852..b7e51f1e8a2f0d5aeb819aff84e042b0fcd5e583 100644 (file)
--- a/backends/json/json.cc
+++ b/backends/json/json.cc
@@ -136,7 +136,7 @@ struct JsonWriter
                sigidcounter = 2;
 
                if (module->has_processes()) {
-                       log_error("Module %s contains processes, which are not supported by JSON backend.\n", log_id(module));
+                       log_error("Module %s contains processes, which are not supported by JSON backend (run `proc` first).\n", log_id(module));
                }
 
                f << stringf("    %s: {\n", get_name(module->name).c_str());