User Guide

Intel® VTune™ Profiler User Guide

ID 766319
Date 12/16/2022

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Problem: Unknown Critical Error Due to Disabled Loopback Interface


When running a command line Linux* target analysis, the Intel® VTune Profiler may display an error message: "Fatal error: Unknown critical error". One of possible reasons could be the disabled loopback interface.


Run the following command to enable the loopback interface: ipconfig lo up.

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