Use glob instead of forking cat with glob patterns. Also use file() instead of forking cat just for reading a file. This might help with the issue reported on Ticket #943 which seems like a timing issue even though the dns events happen before newip events.
Related issues
Bug #943: 2.0-BETA4 Dynamic DNS updates not working
Use glob instead of forking cat with glob patterns. Also use file() instead of forking cat just for reading a file. This might help with the issue reported on Ticket #943 which seems like a timing issue even though the dns events happen before newip events.