Have graphics, but no line, no data

[swordman]

The graphics shown in Cacti have no line in it, and data value are 0 or NaN.
Attached is the log:
//**********************************
09/09/2005 10:19:38 AM - WEBLOG: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe graph - --imgformat=PNG --start=-86400 --end=-300 --title="Devil - Processes" --base=1000 --height=120 --width=500 --alt-autoscale-max --lower-limit=0 --vertical-label="processes" DEF:a="C\:\apache\Apache2\htdocs\cacti/rra/devil_proc_34.rrd":proc:AVERAGE AREA:a#F51D30:"Running Processes" GPRINTLAST:"Current\:%8.0lf" GPRINTAVERAGE:"Average\:%8.0lf" GPRINTMAX:"Maximum\:%8.0lf"
09/09/2005 10:19:37 AM - WEBLOG: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe graph - --imgformat=PNG --start=-86400 --end=-300 --title="Devil - Processes" --base=1000 --height=120 --width=500 --alt-autoscale-max --lower-limit=0 --vertical-label="processes" DEF:a="C\:\apache\Apache2\htdocs\cacti/rra/devil_proc_34.rrd":proc:AVERAGE AREA:a#F51D30:"Running Processes" GPRINTLAST:"Current\:%8.0lf" GPRINTAVERAGE:"Average\:%8.0lf" GPRINTMAX:"Maximum\:%8.0lf"
09/09/2005 10:19:33 AM - WEBLOG: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe graph - --imgformat=PNG --start=-86400 --end=-300 --title="Devil - Traffic" --rigid --base=1000 --height=120 --width=500 --alt-autoscale-max --lower-limit=0 --vertical-label="bits per second" DEF:a="C\:\apache\Apache2\htdocs\cacti/rra/devil_traffic_in_35.rrd":traffic_in:AVERAGE DEF:b="C\:\apache\Apache2\htdocs\cacti/rra/devil_traffic_in_35.rrd":traffic_out:AVERAGE CDEF:cdefa=a,8,* CDEF:cdefe=b,8,* AREA:cdefa#00CF00:"Inbound" GPRINT:cdefa:LAST:" Current\:%8.2lf %s" GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" LINE1:cdefe#002A97:"Outbound" GPRINT:cdefe:LAST:"Current\:%8.2lf %s" GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s"
09/09/2005 10:19:33 AM - WEBLOG: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe graph - --imgformat=PNG --start=-86400 --end=-300 --title="Devil - Traffic" --rigid --base=1000 --height=120 --width=500 --alt-autoscale-max --lower-limit=0 --vertical-label="bits per second" DEF:a="C\:\apache\Apache2\htdocs\cacti/rra/devil_traffic_in_35.rrd":traffic_in:AVERAGE DEF:b="C\:\apache\Apache2\htdocs\cacti/rra/devil_traffic_in_35.rrd":traffic_out:AVERAGE CDEF:cdefa=a,8,* CDEF:cdefe=b,8,* AREA:cdefa#00CF00:"Inbound" GPRINT:cdefa:LAST:" Current\:%8.2lf %s" GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" LINE1:cdefe#002A97:"Outbound" GPRINT:cdefe:LAST:"Current\:%8.2lf %s" GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s"
09/09/2005 10:19:28 AM - WEBLOG: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe graph - --imgformat=PNG --start=-86400 --end=-300 --title="Devil - Logged in Users" --rigid --base=1000 --height=120 --width=500 --alt-autoscale-max --lower-limit=0 --vertical-label="users" DEF:a="C\:\apache\Apache2\htdocs\cacti/rra/devil_users_33.rrd":users:AVERAGE AREA:a#4668E4:"Users" GPRINTLAST:"Current\:%8.0lf" GPRINTAVERAGE:"Average\:%8.0lf" GPRINTMAX:"Maximum\:%8.0lf"
09/09/2005 10:19:21 AM - WEBLOG: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe graph - --imgformat=PNG --start=-86400 --end=-300 --title="Devil - Processes" --base=1000 --height=120 --width=500 --alt-autoscale-max --lower-limit=0 --vertical-label="processes" DEF:a="C\:\apache\Apache2\htdocs\cacti/rra/devil_proc_34.rrd":proc:AVERAGE AREA:a#F51D30:"Running Processes" GPRINTLAST:"Current\:%8.0lf" GPRINTAVERAGE:"Average\:%8.0lf" GPRINTMAX:"Maximum\:%8.0lf"
09/09/2005 10:19:02 AM - SYSTEM STATS: Time: 2.3413 s, Method: cmd.php, Processes: 1, Threads: N/A, Hosts: 3, Hosts/Process: 3, Data Sources 29, RRDs Processed 26
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\devil_traffic_in_37.rrd --template traffic_out:traffic_in 1126253940:358645:1663309
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\devil_snmp_oid_36.rrd --template snmp_oid 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\devil_proc_34.rrd --template proc 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_mem_swap_9.rrd --template mem_swap 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_mem_buffers_8.rrd --template mem_buffers 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_proc_7.rrd --template proc 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_users_6.rrd --template users 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_load_1min_5.rrd --template 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_mem_swap_4.rrd --template mem_swap 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_mem_buffers_3.rrd --template mem_buffers 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_snmp_oid_24.rrd --template snmp_oid 1126253940:U
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\localhost_traffic_in_23.rrd --template traffic_in:traffic_out 1126253940:1663309:358645
09/09/2005 10:19:02 AM - POLLER: Poller[0] CACTI2RRD: c:\rrdtool\rrdtool.exe update C:\apache\Apache2\htdocs\cacti\rra\devil_users_33.rrd --template users 1126253940:U
//**********************************************

THanks!

[BSOD2600]

Turn the polling level in cacti to debug (Settings | Polling level) for one cycle and paste the output of the log file (./cacti/cacti.log). If it contains WEBLOG entries, then don't bother posting since they just clutter up the log. Turn off WEBEVENTS logging and try again.