# Writing to a dataset client tag **URL:** \ **Category:** Ignition\ **Tags:** ignition81, vision\ **Created:** [November 22, 2022, 5:29pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817 "2022-11-22T17:29:30Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Salem\_Marshall](https://avatars.discourse-cdn.com/v4/letter/s/b38774/32.png) [@Salem\_Marshall](https://forum.inductiveautomation.com/u/Salem_Marshall)\ **Post date:** [November 22, 2022, 5:29pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817/1 "2022-11-22T17:29:30Z")
Hello! I am trying to write a vision component value to a dataset tag, but am having trouble getting it to work. I referenced the link below for support but I still get an error message. > [@Write a value to a dataset tag](https://forum.inductiveautomation.com/t/write-a-value-to-a-dataset-tag/15532): > > Hi to everybody I created a datataset tag, and I read the its value correctly using the follow syntax system.tag.read(“tagdata”).value.getValueAt(1, 0) But now I need write a value to into a specific row and column, what is the correct syntax? Thanks a lot Andrea I'm wondering if it isn't working because I am using a client tag? I pasted the error message I am getting and the code snippet below Error message which references the first line of my code: AttributeError: 'com.inductiveautomation.ignition.common.model.valu' object has no attribute 'Value' My code: ds = system.tag.read("[client]calculatedData/PlantData").Value system.tag.write('[client]calculatedData/PlantData',system.dataset.setValue(ds,4,1,event.source.value)) ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [November 22, 2022, 5:39pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817/2 "2022-11-22T17:39:48Z")
> [@Salem\_Marshall](#): > > Error message which references the first line of my code: AttributeError: 'com.inductiveautomation.ignition.common.model.valu' object has no attribute 'Value' You're using uppercase V `.Value`. You need to use lowercase V `.value`. Python, like most programming languages, is case sensitive. Most things in Ignition, even in Python, follow the Java convention of `lowerCamelCase`, rather than e.g. `snake_case`, `kebab-case`, or `UpperCamelCase`. ---
**Author:** ![Salem\_Marshall](https://avatars.discourse-cdn.com/v4/letter/s/b38774/32.png) [@Salem\_Marshall](https://forum.inductiveautomation.com/u/Salem_Marshall)\ **Post date:** [November 22, 2022, 5:41pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817/3 "2022-11-22T17:41:23Z")
Thank you, didn't spot that. I adjusted but got the following error instead: TypeError: 'com.inductiveautomation.ignition.common.model.values.BasicQualifiedValue' object is unsubscriptable ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [November 22, 2022, 5:46pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817/4 "2022-11-22T17:46:38Z")
Post the exact script you're using, ideally inside a preformatted text block (use this icon in the formatting toolbar ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/c/1c5e779a32c1e8a9a4600399a35887af844b85c2.png)) ---
**Author:** ![Salem\_Marshall](https://avatars.discourse-cdn.com/v4/letter/s/b38774/32.png) [@Salem\_Marshall](https://forum.inductiveautomation.com/u/Salem_Marshall)\ **Post date:** [November 22, 2022, 5:53pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817/5 "2022-11-22T17:53:16Z")
I just realized the problem - On my write line I was using '' instead of "" The syntax of these read/write functions confuse me. I had copied the code from a snippet where I had used a list format that used '' within the brackets, if that makes sense? Anyway just two syntax issues in the end, thanks for your help. I posted the working code below in case anyone else is running into issues with this syntax. ```auto ds = system.tag.read("[client]calculatedData/PlantData").value system.tag.write("[client]calculatedData/PlantData",system.dataset.setValue(ds,4,1,event.source.value)) ``` ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [November 22, 2022, 6:07pm UTC](https://forum.inductiveautomation.com/t/writing-to-a-dataset-client-tag/66817/6 "2022-11-22T18:07:41Z")
The TL;DR is that `system.tag.read` and `system.tag.write` were technically deprecated in favor of `system.tag.read(Blocking|Async)` and `system.tag.write(Blocking|Async)`; the new functions have more clear semantics _and_ accept a list of paths/values, which helps to reduce a common performance issue for new users. The tradeoff is they're a bit more confusing at first glance - they _accept_ a list of values, and therefore _return_ a list of values - so you might see e.g. `system.tag.readBlocking(["tagA"])[0].value`, which has an awful lot of square brackets that don't add a whole lot of _clarity_. In spite of their "deprecation", note that we're absolutely not going to remove the existing `read` or `write` functions, for the sake of backwards compatibility. For writing a single tag, there's not really any reason to switch.