rrdtool update isn't working for all datasources

[wiwwy]

I'm running cacti-0.8.6k with cactid on a Linux RHEL5 VM and RRDtool 1.0.50. The log entries show that the "CACTI2RRD: /usr/bin/rrdtool update ..." statements are properly being generated. I'm able to successfully run the "rrdtool update" commands via the command-line. However, the poller isn't updating all the *.rrd files. (The *.rrd files are updated when I run the command from the command-line.) I only have eleven devices enabled at this time. Also, running "php poller.php" from the command-line isn't showing any errors. Any suggestions on how to troubleshoot this problem?

P.S. I've also run "Rebuild Poller Cache" to no avail.

[gandalf]

Please find debugging help at 2nd link of my sig. Please be aware, that we do no longer provide fixes for 086* versions
Reinhard