Hello everyone,
We are experiencing a critical issue when running Multi-User Performance Tests using PerfSDK’s IS-Dispatcher in Dynamics 365 Finance & Operations. The tests fail immediately on the first navigation step, regardless of which form we attempt to open.
Tool Used:
PerfSDK’s IS-Dispatcher (Multi User) (not RSAT).
JS-Dispatcher (Single User/Admin) works fine, but IS-Dispatcher fails.
Manual navigation works fine – we can log in with the test user and access forms like SalesTableListPage and Default Dashboard without any issues.
The same issue occurs in another customer environment that was stable before (last successful test run in December).
This issue suddenly occurred overnight, despite having previously executed many successful test runs without any problems.
Error Details
As soon as the first navigation step is executed in IS-Dispatcher, the test fails with the following error:
Microsoft.Dynamics.TestTools.Dispatcher.Exceptions.DispatcherException: Could not attach to form:
no open form with name 'SalesTableListPage'
This happens regardless of whether we navigate to SalesTableListPage, Default Dashboard, or any other form.
Repro Steps
- Start a test execution in IS-Dispatcher (Multi User).
- Create a new ClientContext using:
- using (var clientContext = ClientContext.Create(Client))
- Provide basic test data (e.g., CustAccountNum to create an sales order) from a local DB
- Attempt to navigate to SalesTableListPage or any other form.
The test fails immediately with the above error.
What We Have Tested So Far
We have already ruled out several potential causes:
- ✔ Network setup – no restrictions preventing access.
- ✔ RSAT certificates – valid and correctly configured.
- ✔ Test user permissions – manually logging in and accessing forms works fine.
- ✔ Code changes – the issue occurs even in older test cases that previously worked.
- ✔ Chromedriver & Virtual Machines – tests fail across multiple environments, including another customer setup.
- ✔ RSAT as a comparison – logging in via RSAT as the test user and opening forms works fine.
Request for Help
Since this issue occurs across multiple environments with no changes on our side, we strongly suspect a problem within PerfSDK’s Multi-User functionality.
Has anyone encountered similar issues with PerfSDK’s IS-Dispatcher? Any suggestions on what might be causing this, or workarounds that helped you resolve it?
Any input would be greatly appreciated!
Thanks in advance.
