Tvheadend

Further to my earlier request for help with the Hauppage DVB-T receiver with Raspberry Pi & OpenElec with Tvheadend, I have just noticed the following in the Tvheadend system log:

Nov 10 08:32:48.660 htsp: Got connection from 127.0.0.1
Nov 10 08:32:48.662 htsp: 127.0.0.1: Welcomed client software: XBMC Media Center (HTSPv8)
Nov 10 08:33:32.258 subscription: "HTTP" direct subscription to adapter: "Zarlink ZL10353 DVB-T", network: "East Anglia", mux: "East Anglia: 658,000 kHz", provider: "", service: "BBC ONE", quality: 100
Nov 10 08:33:32.707 dvb: "_dev_dvb_adapter0_Zarlink_ZL10353_DVB_T658000000_1047" unable to open demuxer "/dev/dvb/adapter0/demux0" for pid 101 -- Too many open files
Nov 10 08:33:32.710 dvb: "_dev_dvb_adapter0_Zarlink_ZL10353_DVB_T658000000_1047" unable to open demuxer "/dev/dvb/adapter0/demux0" for pid 102 -- Too many open filesNov
10 08:33:32.713 dvb: "_dev_dvb_adapter0_Zarlink_ZL10353_DVB_T658000000_1047" unable to open demuxer "/dev/dvb/adapter0/demux0" for pid 106 -- Too many open files
Nov 10 08:33:32.716 dvb: "_dev_dvb_adapter0_Zarlink_ZL10353_DVB_T658000000_1047" unable to open demuxer "/dev/dvb/adapter0/demux0" for pid 105 -- Too many open files

Can anyone tell me what I have done wrong, or omitted?

EMJB