coreybutler/nvm-windows · error

scheduling error: invalid interval %q

Error message

scheduling error: invalid interval %q

What it means

Validation error from ScheduleTask(): the interval argument is not one of the schtasks-supported schedule types (MINUTE, HOURLY, DAILY, WEEKLY, MONTHLY, ONCE, ONSTART, ONLOGON, ONIDLE, EVENT, case-insensitive). It is checked before any temp file or task is created, so nothing is mutated when it fires.

Source

Thrown at src/upgrade/register.go:134

		fallthrough
	case "DAILY":
		fallthrough
	case "WEEKLY":
		fallthrough
	case "MONTHLY":
		fallthrough
	case "ONCE":
		fallthrough
	case "ONSTART":
		fallthrough
	case "ONLOGON":
		fallthrough
	case "ONIDLE":
		fallthrough
	case "EVENT":
		interval = strings.ToUpper(interval)
	default:
		return fmt.Errorf("scheduling error: invalid interval %q", interval)
	}

	start := "00:00"
	if len(startTime) > 0 {
		start = startTime[0]
	}

	tmp, err := os.MkdirTemp("", "nvm4w-regitration-*")
	if err != nil {
		return fmt.Errorf("scheduling error: %v", err)
	}
	defer os.RemoveAll(tmp)

	script := fmt.Sprintf(`
@echo off
set errorlog="error.log"
set output="%s\output.log"
schtasks /create /tn "%s" /tr "cmd.exe /c %s" /sc %s /st %s /F > %%output%% 2>&1

View on GitHub (pinned to 5b18223ca1)

Solutions

1. Use one of the documented keywords: MINUTE, HOURLY, DAILY, WEEKLY, MONTHLY, ONCE, ONSTART, ONLOGON, ONIDLE, or EVENT
2. Trim and uppercase the interval before calling: strings.ToUpper(strings.TrimSpace(interval))
3. For intervals like 'every 5 minutes', use MINUTE and rely on the schtasks /MO modifier semantics documented in the function comment

Example fix

// before
err := ScheduleTask("nvm4w-update", cmd, "minutely")

// after
err := ScheduleTask("nvm4w-update", cmd, "MINUTE")

var validIntervals = map[string]bool{"MINUTE":true,"HOURLY":true,"DAILY":true,"WEEKLY":true,"MONTHLY":true,"ONCE":true,"ONSTART":true,"ONLOGON":true,"ONIDLE":true,"EVENT":true}
iv := strings.ToUpper(strings.TrimSpace(interval))
if !validIntervals[iv] {
    return fmt.Errorf("unsupported interval %q; use one of MINUTE|HOURLY|DAILY|WEEKLY|MONTHLY|ONCE|ONSTART|ONLOGON|ONIDLE|EVENT", interval)
}

func isValidInterval(s string) bool {
    switch strings.ToUpper(strings.TrimSpace(s)) {
    case "MINUTE","HOURLY","DAILY","WEEKLY","MONTHLY","ONCE","ONSTART","ONLOGON","ONIDLE","EVENT":
        return true
    }
    return false
}

When it happens

Trigger: Calling upgrade.ScheduleTask(name, cmd, "minutely") or "secondly", "yearly", "" (empty string), or any string not in the accepted switch list; the comparison is strings.ToUpper(interval) against the fixed set.

Common situations: Passing a cron-style expression or natural-language interval ('every 5 minutes') instead of an schtasks keyword; typo or trailing whitespace in the interval constant; passing an empty string when the caller forgot to default it.

Related errors

• scheduling error: %v %s
• unscheduling error: %v %s
• NVM_SYMLINK is set to a physical file/directory at %s Please
• failed to elevate permissions to create symlink
• Invalid character(s) found in patch number %q

AI-assisted analysis of coreybutler/nvm-windows@5b18223ca1 (2026-08-15). Data as JSON: /api/errors/1ff221b17edc828e. Report an issue: GitHub.