do you have any idea about this type of exception "System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> Data at the root level is invalid. Line 1, position 1."

I have receveided this exception when I tried to call the method "GetTermsets" using the web service "taxonomyclientservice.asmx"

Here is the portion of my code:

Dim ts As New TaxonomyService.Taxonomywebservice
    ts.UseDefaultCredentials = True
    ts.Url = SiteUrl + "/_vti_bin/taxonomyclientservice.asmx"
    Dim timestamp As String
    timestamp = String.Empty


        termsetXML = ts.GetTermSets(sspId, termSetId, 1033, DateTime.Now.ToUniversalTime().Ticks.ToString, 0, timestamp)
        Console.WriteLine("This is the XMLstring that contain all the temrs of the term set : {0}", termsetXML)

        Return termsetXML
    Catch ex As Exception
    End Try

The values of sspId and termSetId are of String type and they get values from an other method that I tested and it is working so well.

Unfortunatally, there no programmer in my team to help in such situationI

Thanks so much!

1 Answer 1


You have probably found the solution by now, but just in case someone else has the same problem: You should include the tags with the parameters you send to the taxonomywebservice.GetTermSets function.

So, just add your own values for [YourTermStoreId] and [YourTermSetId] and it should do the job.

Here's a code sample:

Dim oldtimestamp As String = "<timeStamp>633992461437070000</timeStamp>"
Dim clientVersion As String = "<version>3</version>"
Dim termStoreIds As String = "<termStoreId>" & [YourTermStoreId] & "</termStoreId>"
Dim termSetIds As String = "<termSetId>" & [YourTermSetId] & "</termSetId>"
Dim timeStamp As String = Nothing

termsetXML = ts.GetTermSets(
  • The solution is I should wrap every parameter in my function with XML
    – imen
    Commented Apr 12, 2012 at 19:44

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