My regex isn't working but works in regex builder and regex101

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My regex is working in regex builder and regex101 but it’s not returning any values in my sequence. I am trying to get the account number.

(?<=Account Number:\n\n\n\n\t)\d+

test_text.txt (205 Bytes)

image
image949×954 24.2 KB

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Hi @botdev75

Welcome to the UiPath Community Forum! :partying_face: You are in the right place.

To answer your question… the site .NET Regex Tester - Regex Storm is 100% compatible with UiPath (as far as I know :sweat_smile: ).
Regex101.com IS NOT 100% compatible with UiPath but is fine to use for simple patterns. I find the differences are around the use of “Negative/Positive Look Behind/Ahead” type anchor patterns. In summary, Regex101 is good for simple patterns and learning Regex BUT for more difficult patterns use Regex Storm. I have created a Regex MegaPost where I have covered this briefly. @Yoichi is a forums expert on Regex (and pretty much everything).

Can you please provide:

  • sample (txt file attached - great)
  • Expected output
  • information on the pattern within the text

In the meantime,

I might have a pattern that will work based upon the text file. You can preview it here

This is the pattern:
(?<=Account Number:[\s]+)\d+
It will match any length of digits and any number of new lines, tabs or spaces.

Cheers

1 Like
3

Hi,

it’s linebreak matter. regex101 and regex builder handles linebreak as LF (\n). Howevere, linebreak of Windows text file is CRLF (\r\n).
So the following pattern will work in both.

(?<=Account Number:\r?\n\r?\n\r?\n\r?\n\t)\d+

Note: if number of linebreaks might be increased or decreased, @Steven_McKeering 's pattern is better.

Regards,

1 Like
4

Thanks for your responses. Apologies in advance as I am only a beginner!

I tried both patterns and they both work (as my original regex) but it’s still throwing an error. I am getting a feeling that it might not be the regex but something else? Anyway here is a screenshot of the error and the sequence. I am expecting the account number to be written out.

image
image1375×790 89.8 KB

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Hi,

This error message shows there is no match in ienMatches. Can you review your string and pattern? If possible, can you share your string (item.Body)?

Regards,

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Thank you for the response Yoichi. I reviewed the string and the different pattern variations you provided and it all works in regex101 regex builder and regexstorm. The pattern correctly identifies the account number. But when I run the sequence I get the error which as you explained means no matches were found.

Attached is the item.Body.

string.txt (1.8 KB)

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give a try on following:
grafik

and refer to group
grafik

Regex.Match(YourString,“(?<=Account Number)(?:(.|\n)+?)(\d+)”).Groups(2).toString

Tested on immediate panel

grafik
grafik496×629 13.4 KB

1 Like
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It worked! There was a “bad” email that did not fit the pattern and for some reason it was causing the write line to fail. Once I removed the bad email, the pattern worked and extracted the account numbers from the other emails as expected. Much thanks for helping me!

Question, is there a better pattern that will identify the account number even if the Body text does not conform? OR is there a configuration that will “skip” bad emails and just move on to the next?

Attached is the Body text of the bad email I removed:

bademail.txt (3.1 KB)

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Also working with bad email text:

grafik
grafik627×511 19.8 KB

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Thanks Peter, that pattern works with the bad email!

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perfect, just do your final testing. Once it working mark the solving post as solution or let us know your open questions. Other will benefit from it. Thanks

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