Can't "Enable alerting based on limits" via Script

Hello,

I can't seem to enable "Enable alerting based on limits" via my script.

As far as I'm concerned, you have to set <LimitMode>1</LimitMode> to do so. LimitMaxWarnings and LimitMaxError are written to the channel just fine.

Here is my script: Write-Host "<?xml version="1.0" encoding="UTF-8" ?>" Write-Host "<prtg>" Get-ChildItem "MY PATH" -Recurse -include *.nsf | Where-Object {($_.Length -gt "5e+10")} | ForEach-Object { [string]$filename = $_.Name [float]$filesize = $_.Length Write-Host "<result>" Write-Host "<Channel>$filename</Channel>" Write-Host "<Value>$filesize</Value>" Write-Host "<CustomUnit>GB</CustomUnit>" Write-Host "<VolumeSize>GigaByte</VolumeSize>" Write-Host "<Float>1</Float>" Write-Host "<DecimalMode>Auto</DecimalMode>" Write-Host "<LimitMode>1</LimitMode>" Write-Host "<LimitMaxWarning>53687091200</LimitMaxWarning>" Write-Host "<LimitMaxError>64424509440</LimitMaxError>" Write-Host "</result>" } Write-Host "</prtg>"

As a result I get separate channels for all .NSF files above 50 GB with their filesize in GB as value for the given PATH.

e.g.:

But in the channel settings Value Lookup and Limits is set to

Although when I manually switch it to Enable alerting based on limits LimitMaxWarning and LimitMaxError are set correctly:

---

My question is, how can I Enable alerting based on limits by default via my script?

Thanks in advance! lukas_sch