wasmerio/wasmer · error

Cannot determine app name: use --app_name <app_name>

Error message

Cannot determine app name: use --app_name <app_name>

What it means

Error "Cannot determine app name: use --app_name <app_name>" thrown in wasmerio/wasmer.

Source

Thrown at lib/cli/src/commands/app/deploy.rs:476

            owner.clone()
        } else if self.non_interactive {
            anyhow::bail!("No owner specified: use --owner XXX");
        } else {
            let user =
                wasmer_backend_api::query::current_user_with_namespaces(client, None).await?;
            crate::utils::prompts::prompt_for_namespace(
                "Who should own this app?",
                None,
                Some(&user),
            )?
        };

        let owner = self.ensure_owner_access(client, initial_owner).await?;

        let app_name = if let Some(name) = &self.app_name {
            name.clone()
        } else if self.non_interactive {
            anyhow::bail!("Cannot determine app name: use --app_name <app_name>");
        } else {
            let default_name = base_dir_path
                .file_name()
                .and_then(|f| f.to_str())
                .map(|s| s.to_owned());
            crate::utils::prompts::prompt_new_app_name(
                "Enter the name of the app",
                default_name.as_deref(),
                &owner,
                Some(client),
            )
            .await?
        };

        let app_config = AppConfigV1 {
            name: Some(app_name.clone()),
            app_id: None,
            owner: Some(owner.clone()),

View on GitHub (pinned to 8c4b9ee9d3)

When it happens

Trigger: Thrown at lib/cli/src/commands/app/deploy.rs:476 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of wasmerio/wasmer@8c4b9ee9d3 (2026-09-01). Data as JSON: /api/errors/90a49288987c940b. Report an issue: GitHub.