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ERROR_ENVVAR_NOT_FOUND
The environment variable does not exist
ERROR_ENVVAR_NOT_FOUND indicates that an environment lookup or expansion referenced a variable that is absent. Service, scheduled-task, and interactive process environments can differ significantly.
What to check
- Log the variable name without exposing secret values.
- Inspect the environment inherited by the actual failing process.
- Check user-versus-system scope and whether the process started before the variable changed.
- Provide explicit configuration instead of depending on shell-specific setup.
How to handle it
Handle optional variables with a documented default. For required variables, fail with a clear configuration message rather than continuing with a malformed path or command.
References
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