What causes the error: "Could not append child which had existing parent" when trying to generate a report via Test Manager

The above is displayed via a dialogue box when trying to generate a report

[Jan]

Can you explain with more details, what you try where with which Matlab release?

[Justin Mellor]

I had run a test sequence (Test Harness), via a test file with a blank test suite & a single test case with 2 iterations. The results were visible in the Test Manager Results and Artifacts window and the report started to generate. I think it got to about 60%. Version used is 2016b

[Abhishek]

Please create a service request for this issue here: https://mathworksservicerequest.secure.force.com/cp_case_new?cc=us

Please attach the reproduction steps with needed files, models etc. We will try to resolve this as soon as possible for you.

Answer 1

[Abhishek]

Please take a look at this bug report: https://www.mathworks.com/support/bugreports/1545180

There is a patch attached to the bug report. It should fix the issue.

[Justin Mellor]

Hi, using the 2016b version fix, the error message is now removed and the report generates but even though all the verify statements in the test pass the test report details a failure with the following message:- Simulation Error: An internal error has occurred. Restart MATLAB before proceeding. If this problem persists, please contact MathWorks.

[Abhishek]

This is because of a known bug in Simulation Data Inspector. Please see this bug report: https://www.mathworks.com/support/bugreports/1302441