only all one file to be bound per instance

src/mod/applications/mod_ladspa/mod_ladspa.c

@@ -326,6 +326,10 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 						} else if (!strncasecmp(pvt->str_config[str_idx], "file:", 5)) {
 							char *file = pvt->str_config[str_idx] + 5;
 
+							if (switch_test_flag((&pvt->fh), SWITCH_FILE_OPEN)) {
+								switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), 
+												  SWITCH_LOG_ERROR, "CAN'T CONNECT FILE [%s] File already mapped\n", file);
+							} else {
 								if (switch_core_file_open(&pvt->fh,
 														  file,
 														  read_impl.number_of_channels,
@@ -344,6 +348,7 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 								pvt->ldesc->connect_port(pvt->handle, i, pvt->file_buf);
 								mapped = 1;
 							}
+						}
 
 						str_idx++;
 					}