+ if (list_write == NULL)
+ {
+ ERROR ("plugin_dispatch_values: No write callback has been "
+ "registered. Please load at least one plugin "
+ "that provides a write function.");
+ return (-1);
+ }
+
+ if (data_sets == NULL)
+ {
+ ERROR ("plugin_dispatch_values: No data sets registered. "
+ "Could the types database be read? Check "
+ "your `TypesDB' setting!");