# Tag-expression error-310 **URL:** \ **Category:** Ignition\ **Tags:** ignition80\ **Created:** [March 29, 2021, 9:47am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007 "2021-03-29T09:47:59Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 29, 2021, 9:47am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/1 "2021-03-29T09:47:59Z")
hi, i am getting Error\_ExpressionEval when i bind tags with bar graph…i checked the binding it is fine…i don,t know what is the exact issue…can anyone suggest some solution. ---
**Author:** ![matthew.ayre](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matthew.ayre/32/19499_2.png) [@matthew.ayre](https://forum.inductiveautomation.com/u/matthew.ayre)\ **Post date:** [March 29, 2021, 11:37am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/2 "2021-03-29T11:37:21Z")
Hi @vani161998, could you provide a screenshot of your expression? It is difficult to debug without an example 🙂 ---
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 30, 2021, 3:42am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/3 "2021-03-30T03:42:18Z")
![cell binding](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/3/a3c7d93952c5d2e04157efed1a3b8eefe8791d39.png) i binded the tags in cell update directly . ![tag error](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/8/b8faa0928e844040ea24077fe23bf819803d0296.png) ---
**Author:** ![matthew.ayre](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matthew.ayre/32/19499_2.png) [@matthew.ayre](https://forum.inductiveautomation.com/u/matthew.ayre)\ **Post date:** [March 30, 2021, 8:01am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/4 "2021-03-30T08:01:07Z")
Do you see the error displayed at the bottom of the binding popup, or is the error only being displayed as part of the chart overlay? ---
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 30, 2021, 9:00am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/5 "2021-03-30T09:00:56Z")
no i didn’t see any error other than this ---
**Author:** ![matthew.ayre](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matthew.ayre/32/19499_2.png) [@matthew.ayre](https://forum.inductiveautomation.com/u/matthew.ayre)\ **Post date:** [March 30, 2021, 9:14am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/6 "2021-03-30T09:14:47Z")
@vani161998, apologies just to confirm, you are only seeing the error in the overlay of the chart and not in the binding popup? This would indicate that it is more likely that the data is in an incorrect format for the chart rather than the binding causing the issue. Although I haven’t tested this personally so I could well be wrong. ---
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 30, 2021, 9:19am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/7 "2021-03-30T09:19:26Z")
which one u are referring as binding popup? ---
**Author:** ![matthew.ayre](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matthew.ayre/32/19499_2.png) [@matthew.ayre](https://forum.inductiveautomation.com/u/matthew.ayre)\ **Post date:** [March 30, 2021, 9:32am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/8 "2021-03-30T09:32:45Z")
The first image you posted with the cell update binding information. Normally if there is an error with the binding configuration there is an error shown in red at the bottom of the popup. E.g. Dataset[x, x] \> Error\_ExpressionEval ---
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 30, 2021, 9:48am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/9 "2021-03-30T09:48:00Z")
no i didn’t get any error there …but in property the quality of the tag is Error\_ExpressionEval ---
**Author:** ![matthew.ayre](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matthew.ayre/32/19499_2.png) [@matthew.ayre](https://forum.inductiveautomation.com/u/matthew.ayre)\ **Post date:** [March 30, 2021, 9:59am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/10 "2021-03-30T09:59:12Z")
@vani161998, would you be able to post a picture of the error and where it occurs? Sorry, I am just trying to ensure that I am interpreting the issue correctly 🙂 ---
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 30, 2021, 10:03am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/11 "2021-03-30T10:03:29Z")
![tag error](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/c/7ca5173a63f3d6b8788979ec82a35cfc29a6eb2e.png) ![run diagnostics](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/d/6d18bd6951048e82e99ae02c77a694bbe489412b.png) ---
**Author:** ![matthew.ayre](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matthew.ayre/32/19499_2.png) [@matthew.ayre](https://forum.inductiveautomation.com/u/matthew.ayre)\ **Post date:** [March 30, 2021, 10:16am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/12 "2021-03-30T10:16:20Z")
Ahh ok, we are looking at chart component in Vision. Right the manual states > The data quality code for any Tag bindings on this component Based on that I am guessing that the tags listed in the cell bindings have a syntax error (however, this is me just speculating)? ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [March 30, 2021, 12:24pm UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/13 "2021-03-30T12:24:29Z")
I would take all the cell bindings off (temporarily) to get rid of the error, then add them back one at a time to find the problem. ---
**Author:** ![vani161998](https://avatars.discourse-cdn.com/v4/letter/v/ee7513/32.png) [@vani161998](https://forum.inductiveautomation.com/u/vani161998)\ **Post date:** [March 31, 2021, 3:16am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/14 "2021-03-31T03:16:38Z")
i did that also but still the error continues…i removed all the bindings and did that again ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [March 31, 2021, 11:49am UTC](https://forum.inductiveautomation.com/t/tag-expression-error-310/45007/15 "2021-03-31T11:49:05Z")
So, there’s still an error with all of the cell bindings removed? Then look at other bindings on the component.