Process Crashes on Invoke Workflow Activity after Resuming From Suspension

Help Studio
1

Hello all,

I am having an issue where my project gets this error when it executes its first invoke workflow activity after suspension (for Action Center).

image

Here are some notes:

*I am on Studio 2026.0.189 STS
*It only happens when running from Orchestrator, not when I log on the server and run it from Studio
*Reverting the project to a version from 8 days ago that did not have this error did not fix it
*I added additional “Invoke Workflow” activities and upgraded the process. After this, it still fails on the newer invoke workflow and not just the one that it was hitting first after suspension prior

I am at a loss on how to fix this. Talk about a Friday, eh fellas?

Family Guy Peter Griffin GIF – Family guy Peter griffin Crazy ...

2
  • In your project try to upgrade the UiPath.System.Activities to 26.2.4.
  • Delete the impacted Invoke Workflow activity
  • Save the project
  • Add a new fresh Invoke Wokflow activity
  • Test
  • Publish
  • Try to run
3

Hi @edevries , would it be possible to share the version of System you are using in your workflow? The first time you encountered the issue, do you remember if the error was happening at the suspension point?

4

I am on the latest version of System.Activities right now, but this problem persists even when I roll the process back to an older version of the NuGet package which has an older version of System.Activities as a dependency.

I am working on switching one of my servers to the LTS version of Studio, Assistant and Robot to see if that fixes it.

5

Upgrading my packages was the first thing I tried. Even when I roll my project back to older versions of this process, the error occurs.

I am thinking it has to do with the new STS version of Studio, Assistant and Robot.

6

Wait, I am on 26.2.3, I will upgrade and give it a shot

7

Also, no. It happens upon the first invoke workflow after suspension. Does not matter which one. I have added new ones, and deleted old.

8

26.2.4 worked, had to fix some dependencies but this one resolved the issue invoking workflows are resuming a suspended task.