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XML schema error

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I'm trying to get XML Custom EXE sensor to work in PRTG.

I want a sensor to grab data from a webpage and display the results in PRTG. We have created an EXE in c# that authenticates the webpage and grabs the data and returns it in XML, memory only, no file written. However I keep getting the error:

XML: The returned XML does not match the expected schema. (code: PE233)

Our output:

<prtg>
  <result>
   <channel>Type</channel>
    <value>Service</value>
  </result>
  <result>
    <channel>Unit</channel>
    <value>PH</value>
  </result>
  <result>
    <channel>Label</channel>
    <value></value>
  </result>
  <result>
    <channel>Slot</channel>
    <value>A</value>
  </result>
  <result>
    <channel>HW Version</channel>
    <value>3.62</value>
  </result>
  <result>
    <channel>Serial Number</channel>
    <value>030362002110</value>
  </result>
  <result>
    <channel>Downlink RF Power (dBm)</channel>
    <value>-37.1</value>
  </result>
  <result>
    <channel>Alarm Count</channel>
    <value>0</value>
  </result>
  <result>
    <channel>Alarms</channel>
    <value>None</value>
  </result>
  <result>
    <channel>Max input power (dBm)</channel>
    <value>4</value>
  </result>
  <result>
    <channel>Module State</channel>
    <value>Open</value>
  </result>
  <result>
    <channel>Uplink Gain (dB)</channel>
    <value>1</value>
  </result>
  <result>
    <channel>Downlink Gain (dB)</channel>
    <value>-5</value>
  </result>
</prtg>

Any ideas what we are missing in this output?

Thanks for the assistance.

custom-xml-sensor sensor xml

Created on Nov 10, 2015 5:25:13 PM by  nivsys (0) 1

Last change on Sep 22, 2021 9:31:02 AM by  Luciano Lingnau [Paessler]



6 Replies

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Hi,
in the sensor Settings please activate the option "Write Result to Disk". What results do you get there?

Created on Nov 11, 2015 9:04:40 AM by  Konstantin Wolff [Paessler Support]



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Channels can only hold an integer or float value. Text values like below are not allowed!

  <result>
   <channel>Type</channel>
    <value>Service</value>
  </result>

Created on Nov 11, 2015 6:31:49 PM by  PRTG Tools Family [prtgtoolsfamily.com] (13,263) 3 4



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Ok, here is our updated output and now we are getting a Response not well formed

<?xml version="1.0" encoding="UTF-8" ?>
<prtg>
  <result>
   <channel>1</channel>
   <text>Type</text>
   <text>Service</text>
  </result>
  <result>
   <channel>2</channel>
   <text>Unit</text>
   <text>PH</text>
  </result>
  <result>
   <channel>3</channel>
   <text>Label</text>
  </result>
  <result>
   <channel>4</channel>
   <text>Slot</text>
   <text>A</text>
  </result>
  <result>
   <channel>5</channel>
   <text>HW Version</text>
   <value>3.62</value>
  </result>
  <result>
   <channel>6</channel>
   <text>Serial Number</text>
   <value>030362002110</value>
  </result>
  <result>
   <channel>7</channel>
   <text>Downlink RF Power (dBm)</text>
   <value>-37.1</value>
  </result>
  <result>
   <channel>8</channel>
   <text>Alarm Count</text>
   <value>0</value>
  </result>
  <result>
   <channel>9</channel>
   <text>Alarms</text>
   <text>None</text>
  </result>
  <result>
   <channel>10</channel>
   <text>Max input power (dBm)</text>
   <value>4</value>
  </result>
  <result>
   <channel>11</channel>
   <text>Module State</text>
   <text>Open</text>
  </result>
  <result>
   <channel>12</channel>
   <text>Uplink Gain (dB)</text>
   <value>1</value>
  </result>
  <result>
   <channel>13</channel>
   <text>Downlink Gain (dB)</text>
   <value>-5</value>
  </result>
</prtg>

Created on Nov 13, 2015 3:44:20 PM by  nivsys (0) 1

Last change on Nov 16, 2015 7:14:44 AM by  Konstantin Wolff [Paessler Support]



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Hi,
please make sure in your xml the following tags are present only once per <result>:

<result>
   <channel>CHANNEL NAME</channel>
   <value>NUMERICAL VALUE</value>
  </result>

the <text> tag has to be outside of any result tab but within the <prtg> tag.

Created on Nov 16, 2015 2:57:30 PM by  Konstantin Wolff [Paessler Support]



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Hi,

Ok we got it working. Now an issue is that some information we are displaying has a negative value (-37.5) this displays as zero (0). Where as another value -5 displays correctly.

Suggestions?

Created on Nov 16, 2015 8:33:22 PM by  nivsys (0) 1



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Hi,
in the <result> tag you are returning the -37,5 please add <float>1</float>. Then it should show correctly.

Created on Nov 17, 2015 7:22:48 AM by  Konstantin Wolff [Paessler Support]



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