# Issue using TagProvider.writeAsync for StringArray and DateArray tags

**URL:** <https://forum.inductiveautomation.com/t/issue-using-tagprovider-writeasync-for-stringarray-and-datearray-tags/57766>\
**Category:** Module Development\
**Tags:** ignition80\
**Created:** [March 29, 2022, 5:47pm UTC](https://forum.inductiveautomation.com/t/issue-using-tagprovider-writeasync-for-stringarray-and-datearray-tags/57766 "2022-03-29T17:47:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Sholom\_Ellenbogen](https://avatars.discourse-cdn.com/v4/letter/s/c37758/32.png) [@Sholom\_Ellenbogen](https://forum.inductiveautomation.com/u/Sholom_Ellenbogen)\
**Post date:** [March 29, 2022, 5:47pm UTC](https://forum.inductiveautomation.com/t/issue-using-tagprovider-writeasync-for-stringarray-and-datearray-tags/57766/1 "2022-03-29T17:47:47Z")

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I have a Java ArrayList of string values and am trying to write them to a memory tag of String Array type. I also have an ArrayList of Java.Util.Date objects and trying to write those to a memory tag of type Date Time Array.

I am getting the following error for the string array: [Error\_TypeConversion(“Cannot coerce value ‘[robot 5, robot 4, robot 3, robot 2, robot 1]’ into type: class [Ljava.lang.String;”)]

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**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:** [March 29, 2022, 5:48pm UTC](https://forum.inductiveautomation.com/t/issue-using-tagprovider-writeasync-for-stringarray-and-datearray-tags/57766/2 "2022-03-29T17:48:54Z")

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Have you tried converting them to arrays before you call `writeAsync`?

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**Author:** ![Sholom\_Ellenbogen](https://avatars.discourse-cdn.com/v4/letter/s/c37758/32.png) [@Sholom\_Ellenbogen](https://forum.inductiveautomation.com/u/Sholom_Ellenbogen)\
**Post date:** [March 29, 2022, 5:51pm UTC](https://forum.inductiveautomation.com/t/issue-using-tagprovider-writeasync-for-stringarray-and-datearray-tags/57766/3 "2022-03-29T17:51:43Z")

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Perfect, Thanks.