Index: apps/app_mixmonitor.c
===================================================================
--- apps/app_mixmonitor.c	(revision 403146)
+++ apps/app_mixmonitor.c	(working copy)
@@ -559,6 +559,18 @@
 	ast_string_field_free_memory(&recording_data);
 }
 
+static void send_mixmonitor_status_event(struct mixmonitor *mixmonitor, char *status)
+{
+	ast_manager_event(mixmonitor->autochan->chan, EVENT_FLAG_CALL, "MixMonitorStatus",
+		"Channel: %s\r\n"
+		"File: %s\r\n"
+		"Status: %s\r\n",
+		mixmonitor->name,
+		mixmonitor->filename,
+		status
+		);
+}
+
 static void mixmonitor_save_prep(struct mixmonitor *mixmonitor, char *filename, struct ast_filestream **fs, unsigned int *oflags, int *errflag, char **ext)
 {
 	/* Initialize the file if not already done so */
@@ -579,8 +591,17 @@
 
 			if (!(*fs = ast_writefile(filename, *ext, NULL, *oflags, 0, 0666))) {
 				ast_log(LOG_ERROR, "Cannot open %s.%s\n", filename, *ext);
+				pbx_builtin_setvar_helper(mixmonitor->autochan->chan, "MIXMONITOR_STATUS", "ERROR");
+				send_mixmonitor_status_event(mixmonitor, "ERROR");
 				*errflag = 1;
-			} else {
+			} else if (ast_truncstream(*fs) < 0) {
+				ast_log(LOG_ERROR, "Cannot open %s.%s\n", filename, *ext);
+				pbx_builtin_setvar_helper(mixmonitor->autochan->chan, "MIXMONITOR_STATUS", "ERROR");
+				send_mixmonitor_status_event(mixmonitor, "ERROR");
+				*errflag = 1;
+			}
+			else {
+				pbx_builtin_setvar_helper(mixmonitor->autochan->chan, "MIXMONITOR_STATUS", "OK");
 				struct ast_filestream *tmp = *fs;
 				mixmonitor->mixmonitor_ds->samp_rate = MAX(mixmonitor->mixmonitor_ds->samp_rate, ast_format_rate(&tmp->fmt->format));
 			}
@@ -671,7 +692,12 @@
 				struct ast_frame *cur;
 
 				for (cur = fr; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
-					ast_writestream(*fs, cur);
+					if(ast_writestream(*fs, cur) < 0){
+						pbx_builtin_setvar_helper(mixmonitor->autochan->chan, "MIXMONITOR_STATUS", "ERROR");
+						ast_log(LOG_ERROR, "Cannot write frame %s.%s\n", mixmonitor->filename, mixmonitor->name);
+						send_mixmonitor_status_event(mixmonitor, "ERROR");
+						errflag = 1;
+					}
 				}
 			}
 			ast_mutex_unlock(&mixmonitor->mixmonitor_ds->lock);