Sensor not working while user logged out

for some reasons i couldn´t edit my post. So, for better readability:

$webpage=Invoke-WebRequest "private ip-address" 
$webpage.RawContent | Out-File "C:\Skripte\Tank_S3\webpage_Fuellstand.txt" ASCII -Width 9999
$input_path = "C:\Skripte\Tank_S3\webpage_Fuellstand.txt" 
$output_file2 = "C:\Skripte\Tank_S3\Fuellstand.txt" \\ $regex = '([0-9]{1,2}%)' 
$string_fuellstand = Select-String -Path $input_path -Pattern $regex -list | % { $_.Matches } | % { $_.Value } $string_fuellstand = $string_fuellstand.Remove(2)\\ $text = $string_fuellstand + ":Wert ermittelt." 
$string_fuellstand = $string_fuellstand + ";" + $(get-date).toString('yyyy-MM-dd;HHmmss') $string_fuellstand >> $output_file2 
write-host $text

Kind regards,

Daniel

Hello Daniel,
thank you for your reply.

The original version in the original post is more than fine. :)

I'm not exactly sure how the logged user could be making a difference. Are any sort of credentials required when you do the Invoke-WebRequest "private ip-address" ?

As for the issue, this does normally have to do with permissions. Keep in mind that the PRTG Probe Service which runs custom sensors uses the LOCAL_SYSTEM account by default. You could use services.msc to change this and specify a different account, does the behavior when running the script change?

Also, when you run the script via a scheduled task, which user account is used to run the script?

Something else you can try to track down the issue is to set the "EXE Result" to "Write EXE result to disk" within the Sensor's settings. Once configured to do so a resulting Text File (Filename: 'Result of Sensor [ID].txt') will be stored under the Logs (Sensors) directory on the next scan of the sensor. This folder's path is by default "C:\ProgramData\Paessler\PRTG Network Monitor" of the probe where the sensor is monitored. This log may tell you more about what happens during the sensor's execution.

Also, on a side note, why do you store the file to disk before processing it further? Have you tried something like this?

$webpage = Invoke-WebRequest -Uri "http://fqdn/url" -UseBasicParsing
$regex = '([0-9]{1,2}%)'
$string_fuellstand = Select-String -InputObject $webpage.RawContent -Pattern $regex -list | % { $_.Matches } | % { $_.Value }
$string_fuellstand = $string_fuellstand.Remove(2)
$text = $string_fuellstand + ":Wert ermittelt."
$string_fuellstand = $string_fuellstand + ";" + $(get-date).toString('yyyy-MM-dd;HHmmss')
write-host $text

Note: I haven't tested the code above as I don't know how the input looks like.

Best Regards,

Hi Luciano,

your hint with "writing exe result to disk" worked. Prtg couldn´t call the IE modul while logged off.
So i used your -usebasicparsing switch.

And now everything works just fine.

Thank you for your help.

Kind regards Daniel