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I see the traces in the Resources > View, but when I expand Experiment > Views, all 3 'LTTng-UST > CallStack' entries are striked through so I can't select them. So I > can't visualise the function calls. > > Any idea what I am doing wrong please? AFAIK, the "LD_PRELOAD" environment variable is cleared by sudo when running its child process for security purposes. Thanks, Mathieu > > Best regards, David -- Mathieu Desnoyers EfficiOS Inc. https://www.efficios.com