# Error Writing to PLC

**URL:** <https://forum.inductiveautomation.com/t/error-writing-to-plc/10921>\
**Category:** Ignition\
**Created:** [December 15, 2015, 8:33pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-plc/10921 "2015-12-15T20:33:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jreynolds](https://avatars.discourse-cdn.com/v4/letter/j/58956e/32.png) [@jreynolds](https://forum.inductiveautomation.com/u/jreynolds)\
**Post date:** [December 15, 2015, 8:33pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-plc/10921/1 "2015-12-15T20:33:49Z")

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I’m getting an error when i try to write to my PLC

`Error writing to tag Almco/PLC/Packs/N9/InboundQTY
Write timed out [C].`

This is odd because it seems to wirte okay, but i still get the error.

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<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [December 15, 2015, 8:40pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-plc/10921/2 "2015-12-15T20:40:34Z")

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Anything in the gateway logs? What kind of device is it?

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<div class="post-metadata">

**Author:** ![jreynolds](https://avatars.discourse-cdn.com/v4/letter/j/58956e/32.png) [@jreynolds](https://forum.inductiveautomation.com/u/jreynolds)\
**Post date:** [December 15, 2015, 8:42pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-plc/10921/3 "2015-12-15T20:42:31Z")

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Allen Bradley, Micrologix 1400.

[code]  
ERROR 2:41:23 PM Provider[Ladson\_SC] Unexpected error executing scan class.

com.google.common.util.concurrent.UncheckedExecutionException: com.google.common.collect.ComputationException: com.inductiveautomation.ignition.common.sqltags.parser.TagPathFormatException: Illegal character ‘,’ (Line 1 , Char 35)  
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2203)  
at com.google.common.cache.LocalCache.get(LocalCache.java:3937)  
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941)  
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser.parse(TagPathParser.java:171)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser.parse(TagPathParser.java:157)  
at com.inductiveautomation.ignition.gateway.sqltags.simple.SimpleTagProvider.getPath(SimpleTagProvider.java:82)  
at com.inductiveautomation.ignition.gateway.sqltags.system.GatewaySystemTagsImpl.getPath(GatewaySystemTagsImpl.java:62)  
at com.inductiveautomation.ignition.gateway.sqltags.simple.SimpleTagProvider.updateValue(SimpleTagProvider.java:100)  
at com.inductiveautomation.ignition.gateway.sqltags.providers.AbstractStoreBasedTagProvider.scanclassStatisticsChanged(AbstractStoreBasedTagProvider.java:2118)  
at com.inductiveautomation.ignition.gateway.sqltags.scanclasses.SimpleExecutableScanClass.notifyStatistics(SimpleExecutableScanClass.java:472)  
at com.inductiveautomation.ignition.gateway.sqltags.scanclasses.SimpleExecutableScanClass.run(SimpleExecutableScanClass.java:905)  
at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$TrackedTask.run(BasicExecutionEngine.java:584)  
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)  
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)  
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)  
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
at java.lang.Thread.run(Unknown Source)  
Caused by: com.google.common.collect.ComputationException: com.inductiveautomation.ignition.common.sqltags.parser.TagPathFormatException: Illegal character ‘,’ (Line 1 , Char 35)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser$ParseFunction.load(TagPathParser.java:411)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser$ParseFunction.load(TagPathParser.java:404)  
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)  
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)  
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)  
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)  
… 19 more  
Caused by: com.inductiveautomation.ignition.common.sqltags.parser.TagPathFormatException: Illegal character ‘,’ (Line 1 , Char 35)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathLexer.errMsg(TagPathLexer.java:213)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathLexer.errMsg(TagPathLexer.java:217)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathLexer.yylex(TagPathLexer.java:735)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser.\_parse(TagPathParser.java:198)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser.access$200(TagPathParser.java:27)  
at com.inductiveautomation.ignition.common.sqltags.parser.TagPathParser$ParseFunction.load(TagPathParser.java:409)  
… 24 more  
less[/code]

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<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [December 15, 2015, 8:58pm UTC](https://forum.inductiveautomation.com/t/error-writing-to-plc/10921/4 "2015-12-15T20:58:02Z")

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Not sure if that’s related or not.

You might send your logs into support and see if they can find anything. You can export them from the console page of the gateway.