Hi
Love this plugin, only strange thing after some time they all disappear, like the after an automated reboot which ive set up twice per 24 hours. 
Its not decayment thats kicking in, its just one moment;
06:00 [Info] [JPipes] 165 pipes saved 
and the next right before autoreboot kicks in;
06:01 [Info] [JPipes] 0 pipes saved
06:01 [Info] Unloaded plugin JPipes v0.6.9 by TheGreatJ

might you have any idea whats going on here ?