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Substring function

we are able to invoke Nintex workflows through web
services but we now have a small issue on substring function:

  

Requirement: We need to select a specific text (row id)
from a paragraph (integration event Summary that has special characters)

  

Problem: Substring function in Nintex workflow currently
throws a random value, we would like to know the correct approach to resolve
the issue.

Syntax Used:
fn-Substring({TextStart}{WorkflowVariable:mtext_itemdescription}{TextEnd},0,20)

  

Thank you

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Workflow Hero

Re: Substring function

Could you send sample values for

{TextStart}

{WorkflowVariable:mtext_itemdescription}

{TextEnd}

and

the result of fn-Substring({TextStart}{WorkflowVariable:mtext_itemdescription}{TextEnd},0,20)     ?

Thanks

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