(14:58:54) | Server Exception: Building Manager

(14:58:54) | NullReferenceException

(14:59:53) | Server Exception: Building Manager

(14:59:53) | NullReferenceException

Im having this kinda spam my rcon, what does it mean ?

Check your Unity output_log.txt for the full error.

well, heres one, but I dont think its related to this.

NullReferenceException
  at (wrapper managed-to-native) UnityEngine.Component.GetComponentFastPath(UnityEngine.Component,System.Type,intptr)
  at UnityEngine.Component.GetComponent[T] () [0x00020] in <7848bf5ffb154531ab6a4765738d835a>:0 
  at Oxide.Plugins.PowerSmelt+<InitOvens>c__Iterator1.MoveNext () [0x0012e] in <8653f6725ba94d71bb3204dfc86e9761>:0 
  at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00027] in <7848bf5ffb154531ab6a4765738d835a>:0 ​

So that partular NRE looks to be from PowerSmelt, I'd suggest reporting it to the developer of it. Unsure what the Building Manager is still, or if it is related.

ill keep an eye out for the building one, and look before I restart again. But for now. Looks like a restart fixed the building manager one. idk. just before then. we were trying to figure out why foundations were going invisible. :)

Here it is. 

NullReferenceException
  at (wrapper managed-to-native) UnityEngine.Component.get_transform(UnityEngine.Component)
  at BaseEntity.WorldSpaceBounds () [0x00000] in <b5a0c3a35ad14b92960ca9461b4965cd>:0 
  at BaseEntity.GetBuildingPrivilege () [0x00000] in <b5a0c3a35ad14b92960ca9461b4965cd>:0 
  at DecayEntity.GetBuildingPrivilege () [0x00014] in <b5a0c3a35ad14b92960ca9461b4965cd>:0 
  at DecayEntity.DecayTick () [0x00078] in <b5a0c3a35ad14b92960ca9461b4965cd>:0 
  at ServerBuildingManager.Cycle () [0x001b3] in <b5a0c3a35ad14b92960ca9461b4965cd>:0 
  at ServerMgr.Update () [0x00087] in <b5a0c3a35ad14b92960ca9461b4965cd>:0 
UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.Debug:LogException(Exception, Object)
ServerMgr:Update()​

I think a player is triggering this somehow, not sure how though. but we're getting invisible foundations, not being able to upgrade certain grades? from what I can tell from how they are explaining it to me. 

Keeps on spamming that.

(21:45:34) | Server Exception: Building Manager

(21:45:34) | NullReferenceException

(21:45:37) | Server Exception: Building Manager

(21:45:37) | NullReferenceException

Server Exception: Building Manager (Filename: C:\buildslave\unity\build\Runtime/Export/Debug.bindings.h Line: 43) NullReferenceException at (wrapper managed-to-native) UnityEngine.Component.get_transform(UnityEngine.Component) at BaseEntity.WorldSpaceBounds () [0x00000] in :0 at BaseEntity.IsOutside () [0x00000] in :0 at DeployableDecay.ShouldDecay (BaseEntity entity) [0x0000c] in :0 at DecayEntity.DecayTick () [0x00036] in :0 at ServerBuildingManager.Cycle () [0x001b3] in :0 at ServerMgr.Update () [0x00087] in :0 UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object) UnityEngine.DebugLogHandler:LogException(Exception, Object) UnityEngine.Logger:LogException(Exception, Object) UnityEngine.Debug:LogException(Exception, Object) ServerMgr:Update()

did you use the last version of recycler plugin ? for us it have to do with this plugin we use as temp fix again the pre Version 2.1.7

after Update back to rec plugin 2.1.7 just restart Server to avoide this error in the console

edit:

https://umod.org/community/recycle/3868-major-problems-with-newest-version?page=1

Ahh, alright, ty for that info.