Hello Experts.
We are migrating our BP from 6.10.2 to 7.2.1.
While evaluating an existing process, we identified that an error occurs when we tried to attach 02 different objects to the same website (using edge chromium).
Error message: Internal : Failed to perform step 1 in Navigate Stage 'Attach' on page 'Attach' - Failed to attach - Object reference not set to an instance of an object.
Steps to reproduce the error:
-
-
Object 1 - Attach using process name "msedge"
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Returns to the BP Process without Detach
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Object 2 - Try to Attach to the same process using process name "msedge" (returns an error)
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Object 2 - Executes any action on the site (not possible)
Business Objects Config:
-
Object 1
- Application Manager Mode – External 64 bits
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Object 2
- Application Manager Mode – External 64 bits
Notes:
- After step 2 we can find AppMan64.exe running
- In step 4 we can see a new AppMan64.exe process being created but ended quickly (then the exception pops up on the process)
- If we detach Object 1 before calling the attach action in Object 2 it works
IMPORTANT: If we change the application manager mode to "Embedded" for both objects it works. However, we understand that "Embedded" is there just for compatibility with old versions of Blue Prism and the best practice is to use "External" options (to have a separate process responsible for interacting with the application - AppMan64.exe or AppMan32.exe, depending on the app architecture. It gives more control and prevents Automate.exe from crashing during critical errors).
Although this issue refers to a delay, not an error.
Our questions are:
Is it possible to attach multiple objects to the same Web Browser (Edge Chromium, Chrome) without detaching?
We tested using a regular Windows app (like notepad.exe) and it works perfectly without detaching any object.
Is there any restriction for this scenario related to BP Extension, AppMan.exe, and BluePrism.MessagingHost.exe (introduced in BP 7)?
Why is it working when both objects are set as "Embedded"?
Runtime Specs:
Blue Prism: 7.2.1
Blue Prism Extension for Edge Chromium: Version 7.2.0.0
Windows 11 64 bits - 22H2 - Build 22621.1848
Edge Chromium: Version 120.0.2210.89 (Official build) (64-bit)
We have an opened ticket with the support but without a definitive answer until know.
We appreciate any information the community could provide about what should be the best way to solve this issue.
Thanks!
Regards,
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Flavio Lara
System Analyst
Vallourec Tubos do Brasil
Belo HorizonteBrazil
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