System variables are gone in one of my webcore pistons

[user3930]

HI,
I just open one of my piston to make somes little changes and notice that some expression where I use $variable were in red and unresolved, so I notice that the system variables are not even listed like it no longer exist.
In my other pistons its still ok, so I need your help on that one! Why only this piston wont connect to the system variables?

Thanks!

[nh.schottfam]

I suggest check this steps

[Wiki] webCoRE Documentation Digest

Problem solving: There are four classes of issues commonly seen: HE firmware is not up to date do keep your HE firmware up to date webCoRE is not installed properly, or not up to date ways to resolve: politely reboot your HE hub (HE console -> Settings -> "Reboot") Let the hub settle after the reboot (3 mins or so) then try again. common resolution: (If using built-in, above suggestion should cover this) Ensure webcore files are up to date: if using the built-in webCoRE…

[user3930]

Up to date and still no system variable in this particular piston.
Looks like a bad link from the piston itself… those variable used inside are working great but are in red in the expression like the link is lost with the system variable…

[user3930]

I also tried to create a duplicate piston which works before to save it. Before to save I was able to access system variable but as soon as I save, I first get an error message (sorry but an error occur while saving) or something like that and then the piston is there but no access to system variable anymore.

[user3930]

Piston s logs are normals... Still don't know why the system variables are gone...