# Error on expression **URL:** \ **Category:** Apps\ **Tags:** question, studio, activities\ **Created:** [May 19, 2021, 11:04am UTC](https://forum.uipath.com/t/error-on-expression/316229 "2021-05-19T11:04:32Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:04am UTC](https://forum.uipath.com/t/error-on-expression/316229/1 "2021-05-19T11:04:32Z")
![image](https://global.discourse-cdn.com/uipath/original/3X/4/1/4184dfa40b07adbd9c8d227632111deca8b8ef12.jpeg) Please help me it works fine on one xaml when i change the function to another xaml i got this error This is very urgent pls help me to rectify this error ---
**Author:** ![sarathi125](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sarathi125/32/519448_2.png) [@sarathi125](https://forum.uipath.com/u/sarathi125)\ **Post date:** [May 19, 2021, 11:07am UTC](https://forum.uipath.com/t/error-on-expression/316229/2 "2021-05-19T11:07:40Z")
@Sudharsan_Ka , In the code change this and try, ```auto Cast(Of System.Text.RegularExpression.Regex.Matches).Select(Function(m) m.Value).ToList() ``` ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:10am UTC](https://forum.uipath.com/t/error-on-expression/316229/3 "2021-05-19T11:10:26Z")
> [@sarathi125](#): > > `Cast(Of System.Text.RegularExpression.Regex.Matches).Select(Function(m) m.Value).ToList()` Getting this error ![image](https://global.discourse-cdn.com/uipath/original/3X/7/f/7fd8d9540a4326b5c6b33789a32e2b2d21612530.png) ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 11:10am UTC](https://forum.uipath.com/t/error-on-expression/316229/4 "2021-05-19T11:10:38Z")
@Sudharsan_Ka - it is cast of Match …not matches … ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:11am UTC](https://forum.uipath.com/t/error-on-expression/316229/5 "2021-05-19T11:11:57Z")
Same error is shown ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 11:15am UTC](https://forum.uipath.com/t/error-on-expression/316229/6 "2021-05-19T11:15:10Z")
@Sudharsan_Ka - This is my working code, which is almost similar to what you are trying… ![image](https://global.discourse-cdn.com/uipath/original/3X/d/c/dc545019ef79d3cfda007b38fa782d9c29d9b224.png) Please show us your complete asssign statement with the variable type. ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:16am UTC](https://forum.uipath.com/t/error-on-expression/316229/7 "2021-05-19T11:16:20Z")
My whole expression is like **System.Text.RegularExpressions.Regex.Matches(input\_data,“.\*(?=Acord)”).Cast(Of Match).Select(Function(m) m.Value).ToList().Where(Function(r) r.ToString\<\>“”).Count.ToString** I need to change anything here ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 11:20am UTC](https://forum.uipath.com/t/error-on-expression/316229/8 "2021-05-19T11:20:44Z")
> [@Sudharsan\_Ka](#): > > System.Text.RegularExpressions.Regex.Matches(input\_data,“.\*(?=Acord)”).Cast(Of Match).Select(Function(m) m.Value).ToList().Where(Function(r) r.ToString\<\>“”).Count.ToString @Sudharsan_Ka - I see no error when I added this…Since I dont have the input data, mocked input data as string for testing purpose… ![image](https://global.discourse-cdn.com/uipath/original/3X/7/3/739846facd5417a9393a5068054a95628508fbef.png) StrCount is String Variable… Note: Import the below if its still showing an error ![image](https://global.discourse-cdn.com/uipath/original/3X/e/c/ec93fba36b5767e6d792a1e8182b5a7ee14824e7.png) ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:31am UTC](https://forum.uipath.com/t/error-on-expression/316229/9 "2021-05-19T11:31:22Z")
How to import that bro ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 11:33am UTC](https://forum.uipath.com/t/error-on-expression/316229/10 "2021-05-19T11:33:31Z")
@Sudharsan_Ka - just type in the search bar on the import tab as system.text.regular.expressions ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:52am UTC](https://forum.uipath.com/t/error-on-expression/316229/11 "2021-05-19T11:52:52Z")
> [@Sudharsan\_Ka](#): > > System.Text.RegularExpressions.Regex.Matches(input\_data,“.\*(?=Acord)”).Cast(Of Match).Select(Function(m) m.Value).ToList().Where(Function(r) r.ToString\<\>“”).Count.ToString when i click on the System.Text.Regulare Expressions ![image](https://global.discourse-cdn.com/uipath/original/3X/7/4/74f0541ab14a402d2c969385292821af9c2dd3fe.png) ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 11:56am UTC](https://forum.uipath.com/t/error-on-expression/316229/12 "2021-05-19T11:56:41Z")
still same error ![image](https://global.discourse-cdn.com/uipath/original/3X/a/c/acc6ff1170f6552f3c06c00517ce30504e074dd9.png) ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 12:01pm UTC](https://forum.uipath.com/t/error-on-expression/316229/13 "2021-05-19T12:01:15Z")
> [@Sudharsan\_Ka](#): > > when i click on the System.Text.Regulare Expressions Where you clicked??? I am not sure… ![image](https://global.discourse-cdn.com/uipath/original/3X/9/2/92240a085de0e48094920ea402518789ab2153fd.png) What is the variable type of CountGDPR? Please share the text which you are getting for pbdw1, i will share the code for you… ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 12:13pm UTC](https://forum.uipath.com/t/error-on-expression/316229/14 "2021-05-19T12:13:22Z")
Comunicari in vederea derularii contractului de furnizare e.e. Acord Dezacord Comunicari Marketing, campanii si comercializare produse Acord Dezacord Participarea la sondaje de piata Acord Dezacord ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 12:19pm UTC](https://forum.uipath.com/t/error-on-expression/316229/15 "2021-05-19T12:19:50Z")
@Sudharsan_Ka - ok thanks…you want the count of matches?? ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 12:26pm UTC](https://forum.uipath.com/t/error-on-expression/316229/16 "2021-05-19T12:26:12Z")
I have screen scrapped from the app I just need the count of rows ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 12:41pm UTC](https://forum.uipath.com/t/error-on-expression/316229/17 "2021-05-19T12:41:56Z")
@Sudharsan_Ka - Here StrTest is your text input, in your case pbdw1… ``` Strtest.split(Environment.NewLine.ToCharArray).count.ToString ``` Please check and let us know… ---
**Author:** ![Sudharsan\_Ka](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/sudharsan_ka/32/459826_2.png) [@Sudharsan\_Ka](https://forum.uipath.com/u/Sudharsan_Ka)\ **Post date:** [May 19, 2021, 12:49pm UTC](https://forum.uipath.com/t/error-on-expression/316229/18 "2021-05-19T12:49:51Z")
> [@prasath17](#): > > ` Strtest.split(Environment.NewLine.ToCharArray).count.ToString` It is showing the result as 5 bro In my case i am only having 3 rows ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 1:00pm UTC](https://forum.uipath.com/t/error-on-expression/316229/19 "2021-05-19T13:00:20Z")
@Sudharsan_Ka - You gave a 3 line text and When i am running i am getting count as 3…you getting 5…something is not right here… Let me try the Regex route… ---
**Author:** ![prasath17](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/prasath17/32/182331_2.png) [@prasath17](https://forum.uipath.com/u/prasath17)\ **Post date:** [May 19, 2021, 1:05pm UTC](https://forum.uipath.com/t/error-on-expression/316229/20 "2021-05-19T13:05:23Z")
@Sudharsan_Ka - Please try this… ![image](https://global.discourse-cdn.com/uipath/original/3X/4/d/4d27638489954ef81f591cc201b0795ac7cd0e84.png) ``` system.text.RegularExpressions.regex.Matches(Strtest,".+(?=Acord)").Count.ToString ``` .\* - will give 5 matches, That’s why I adjusted it to .+ which gives only 3 matches… ![image](https://global.discourse-cdn.com/uipath/original/3X/4/5/45ebad907509791e0ab95d60655fea8da2ff14c8.png) [Next page](https://forum.uipath.com/t/error-on-expression/316229.md?page=2)