Tested it. All pipes are gone when i unload the plugin.
When i reload it than all players kicked. package flooding

Not sure what has happened there. Did you get any error messages?

Not sure why you would have had package flooding.

Pipes will always disapear when you unload though. They should return when you reload the plugin.

Here is the log from install to kick. I unistalled it complete now. Dont know whats the problem.

23:29 [Info] SyncPipes was compiled successfully in 996ms
23:29 [Info] [Sync Pipes] Registered language for 'en'
23:29 [Info] [Sync Pipes] Loading Config
23:29 [Info] [Sync Pipes] Setting Defaults
23:29 [Info] [Sync Pipes] Upgrading from old data store
23:29 [Info] Loaded plugin Sync Pipes v0.9.26 by Joe 90
23:29 [Info] [Skin Shop] Destroyed 65 elements
23:30 [Info] [Economics] Saving balances for players...
23:30 [Info] [Advert Messages] Bist du neu auf der Insel? Hole dir Starthilfe mit<color=#9b9c9a> /kit</color>
23:30 [Info] [Skin Shop] Saving Skin Data: 0 players
23:35 [Info] [Economics] Saving balances for players...
23:35 [Info] [Skin Shop] Saving Skin Data: 0 players
23:38 [Info] [Advert Messages] Vergesse deinen VOTE nicht, und sacke den <color=#7c3da1>AIRDROP</color> ein. Schreibe <color=#9b9c9a>/vote</color> und besuche die angebebene Adresse.
23:38 [Info] [Sync Pipes] Unloading All Pipes
23:38 [Info] Unloaded plugin Sync Pipes v0.9.26 by Joe 90
23:40 [Info] [Economics] Saving balances for players...
23:40 [Info] [Skin Shop] Saving Skin Data: 0 players
23:43 [Info] [Sync Pipes] Registered language for 'en'
23:43 [Info] [Sync Pipes] Loading Config
23:43 [Info] [Sync Pipes] Upgrading from old data store
23:43 [Info] Loaded plugin Sync Pipes v0.9.26 by Joe 90
23:45 [Info] [Welcomer] Spieler ......... hat den Server verlassen. Grund Kicked: Unresponsive
23:45 [Info] [Economics] Saving balances for players...
23:45 [Info] [Welcomer] Spieler ......... hat den Server verlassen. Grund Kicked: Packet Flooding: Player Tick
23:46 [Info] [Skin Shop] Saving Skin Data: 0 players
23:46 [Info] [Advert Messages] Hast du Fragen? Schaue doch mal die Hilfeseiten an <color=#9b9c9a>/info</color>
23:50 [Info] [Economics] Saving balances for players...
23:50 [Info] [FancyDrop] Timed Airdrop skipped, not enough Players
23:50 [Info] [FancyDrop] Next timed Airdrop in 53 minutes

That looks very odd as it appears to be re-registering the languanges each time which shouldn't normally happen.

Anything i can do?

Is it generating any log files. Also could you send me the data file so I can check to see if there are any corruptions in it.

Theres nothing in data file. only this also when i create pipes. looks the same than.

{
"PipeData": null,
"ContainerData": null
}

Not sure how but it looks like it has corrupted.
PipeData and ContainerData should never be null. Try deleting the data file and then reloading the plugin.

Merged post

Is that the only SyncPipes data file or are there other versions?

Only one file. After delete and reload the same
{
"PipeData": null,
"ContainerData": null
}

(00:54:38) | [Sync Pipes] Unloading All Pipes

(00:54:38) | Unloaded plugin Sync Pipes v0.9.26 by Joe 90

(00:54:38) | [Sync Pipes] Registered language for 'en'

(00:54:38) | [Sync Pipes] Loading Config

(00:54:38) | [Sync Pipes] Upgrading from old data store

(00:54:38) | Loaded plugin Sync Pipes v0.9.26 by Joe 90

Are your players still being kicked?

Dont know, they dont come back :). I try again, make some pipes and unload it.

Merged post

No kick now but all pipes gone and empty data file after unload.

There seems to be an upgrade fault if you go direct from 0.9.20 direct to 0.9.26. I think most beta users installed the other versions along the way so this wasn't picked up.

Merged post

I'm just trying to fix it now as it then get stuck in an upgrade loop.

Merged post

I've just released a new version that should fix this issue.

Installed it and i have now two files in data folder.
First one SyncPipes.json
{
"PipeData": null,
"ContainerData": null
}

Second one SyncPipes_v1-0.json
{
"pipes": [],
"containers": []
}

I created 3 Pipes and unload it. Pipes was not saved and gone.

(10:59:23) | [Sync Pipes] Save v1.0 starting

(10:59:23) | [Sync Pipes] Saved 3 pipes

(10:59:23) | [Sync Pipes] Saved 4 managers

(10:59:23) | [Sync Pipes] Save v1.0 complete (0.01s)

(10:59:23) | [Sync Pipes] Unloading All Pipes

(10:59:23) | Unloaded plugin Sync Pipes v0.9.27 by Joe 90

It should now store into the 1.0 file. 

Ok, now i see it. Seems that it takes a while to refresh that file.
Much thanks for your time and work!