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Pre-synthesis Control Flow Error occurred after running C simulation
After I ran the C simulation on the synthesis and analysis part of the Vitis HLS Getting Started tutorial, the dct_csim.log gave TEST PASSED, but the Pre-synthesis control flow did not show up and an error occurred in the problem console as the followings:
Same problem reported on Xilinx forum, but not solved.
Can you post your operating system information here?

Hi all,
Is there any update regarding this issue? I am having the same problem in Vitis HLS 2020.2 on Ubuntu 20.04.6 LTS.
The issue appears to be something related to the environment or system setup. I was not able to recreate the problem described above. Can you share any additional information related to your environment?
Hi again and thank you for the quick reply!
Actually i found the problem in my case. There was a problem with my setup. I had to change my default desktop environment with this command "$ sudo update-alternatives --config x-session-manager".