# SQL Tag Scan Class warnings in console

**URL:** <https://forum.inductiveautomation.com/t/sql-tag-scan-class-warnings-in-console/9294>\
**Category:** Ignition\
**Created:** [November 6, 2014, 12:13am UTC](https://forum.inductiveautomation.com/t/sql-tag-scan-class-warnings-in-console/9294 "2014-11-06T00:13:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jonathan](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonathan](https://forum.inductiveautomation.com/u/Jonathan)\
**Post date:** [November 6, 2014, 12:13am UTC](https://forum.inductiveautomation.com/t/sql-tag-scan-class-warnings-in-console/9294/1 "2014-11-06T00:13:25Z")

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Why do I keep getting the following messages over and over again in the console? The manual says i can have a slow rate of 0 for a leased scan class.

quote 4:10:49 PM BasicExecutionEngine Modifying an existing execution unit. [Owner=tag scanclasses [sqltags], Name=packagingtransferlinesleased]  
(I) 4:10:49 PM BasicExecutionEngine Modifying an existing execution unit. [Owner=tag scanclasses [sqltags], Name=buffertanksleased]  
(I) 4:10:49 PM BasicExecutionEngine Modifying an existing execution unit. [Owner=tag scanclasses [sqltags], Name=leased]  
(I) 4:10:49 PM BasicExecutionEngine Modifying an existing execution unit. [Owner=tag scanclasses [sqltags], Name=every 5 seconds leased]  
[WARN] 4:10:47 PM BasicExecutionEngine Tried to register unit [tag scanclasses [sqltags] leased] with rate of 0. Will be ignored.  
[WARN] 4:10:47 PM BasicExecutionEngine Tried to register unit [tag scanclasses [sqltags] packagingtransferlinesleased] with rate of 0. Will be ignored.  
[WARN] 4:10:47 PM BasicExecutionEngine Tried to register unit [tag scanclasses [sqltags] every 5 seconds leased] with rate of 0. Will be ignored.  
(I) 4:10:44 PM BasicExecutionEngine Modifying an existing execution unit. [Owner=tag scanclasses [sqltags], Name=leased]  
[WARN] 4:10:44 PM BasicExecutionEngine Tried to register unit [tag scanclasses [sqltags] buffertanksleased] with rate of 0. Will be ignored.  
[WARN] 4:10:44 PM BasicExecutionEngine Tried to register unit [tag scanclasses [sqltags] leased] with rate of 0. Will be ignored.  
(I) 4:10:24 PM BasicExecutionEngine Modifying an existing execution unit. [Owner=tag scanclasses [sqltags], Name=every 5 seconds leased]  
[WARN] 4:10:21 PM BasicExecutionEngine Tried to register unit [tag scanclasses [sqltags] every 5 seconds leased] with rate of 0. Will be ignored.[/quote]