The following error may appear in the event log

Event Type: Error
Event Source: WSH
Event Category: None
Event ID: 1
Description:
Citrix Monitoring Script Event 2
Citrix MetaFrame Session In Down State:
"seconds" parameter (300) is not a valid positive number <= 240

CTX108668 describes how to resolve this issue in PS4. In PS 4.5 the setting is in Access Management Console in the following location:

- Access Management Console | Presentation Server | <farm> | Monitoring
- Configuration | Farm Monitoring
- Select Available Alerts
- Select Session idle for to long
- Click Configure alert
- Uncheck Alert enabled or set parameters to check for to less than four minutes

Error: Citrix Scripting Error 2 - WSH - id1
http://support.citrix.com/article/CTX108668