Unable to read from ValueCache

[[email protected]]

Hi all.

Using zabbiz-server 4.0.20. One trigger (/etc/passwd has been changed on {HOST.NAME}) one one host has the following error on it:
Cannot evaluate expression: "Cannot evaluate function "Shampoo:vfs.file.cksum[/etc/passwd].diff(0)": cannot get values from value cache."
Reading up about ValueCache, I disabled it by setting the value to 0 and restarting the server. The error remains exactly the same. I re-enabled the valueCache to a bigger value (16M), restarted the server. Still have the same issue. Does anybody have an idea on how to fix this?

Kind Regards.

Shaun.

[Hamardaban]

Wait until at least 2 values are obtained for this data element to calculate the diff function.

[[email protected]]

Sorry, should have mentioned. This has been running since June last year. I only noticed it now.

[AlexEastwood]

Wait until at least 2 values are obtained for this data element to calculate the diff function.

If the reason for this warning/error is that there are no values in the value cache, that could be made clearer the the user. As it is it appears as if there is some problem with the value cache that needs to be fixed.