Hi Sanaa,
This error is most like caused due to attach issue with the application, try to create an attach page with the following template as shown below:
In you 'Enter Order Number' action, remember to call this page once before executing your actual sequence as shown below:
This should most likely fix your issue.
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Hope it helps you and if it resolves you query please mark it as the best answer so that others having the same problem can track the answer easily
Regards,
Devneet Mohanty
Intelligent Process Automation Consultant | Sr. Consultant - Automation Developer,
Wonderbotz India Pvt. Ltd.
Blue Prism Community MVP | Blue Prism 7x Certified Professional
Website:
https://devneet.github.io/Email: devneetmohanty07@gmail.com
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Hope this helps you out and if so, please mark the current thread as the 'Answer', so others can refer to the same for reference in future.
Regards,
Devneet Mohanty,
SS&C Blueprism Community MVP 2024,
Automation Architect,
Wonderbotz India Pvt. Ltd.