If an item is in the queue whose file name contains a %, the following error occurs, causing the item never to be dequeued:
```in procedure '::auto::dumpq' called at file "/mod/webif/lib/auto/deq", line 167
at file "/mod/webif/lib/auto/deq", line 118
/mod/webif/lib/auto/deq:118: Error: not enough arguments for all format specifiers```
The file name needs to be passed to `format` as a parameter with format `%s` rather than embedding it in the format string, or else ```log "[format ...][$q get file]"```