CLR Function - Invalid Character In The Given Encoding

Hello!



I wrote a CLR function, which is receiving some XML parameters. In certein situations it gives me the following error message:


Msg 6522, Level 16, State 1, Line 58
A .NET Framework error occurred during execution of user-defined routine or aggregate "svmScale":
System.Xml.XmlException: Invalid character in the given encoding. Line 1, position 27.
System.Xml.XmlException:
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
at System.Xml.XmlTextReaderImpl.InvalidCharRecovery(Int32& bytesCount, Int32& charsCount)
at System.Xml.XmlTextReaderImpl.GetChars(Int32 maxCharsCount)
at System.Xml.XmlTextReaderImpl.ReadData()
at System.Xml.XmlTextReaderImpl.ParseText(Int32& startPos, Int32& endPos, Int32& outOrChars)
at System.Xml.XmlTextReaderImpl.ParseText()
at System.Xml.XmlTextReaderImpl.ParseElementContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlWriter.WriteNode(XmlReader reader, Boolean defattr)
at System.Data.SqlTypes.SqlXml.CreateMemoryStreamFromXmlReader(XmlReader reader)
at System.Data.SqlTypes.SqlXml..ctor(XmlReader value)
at UserDefinedFunctions.svmScale(SqlXml sql_problem, Boolean perChannel, Single x_factor, Single y_factor)



The call:

declare @data xml, @param xml

set @data = '<root>
<d>
<y>3.950000000000000e+002</y>
<v>3.896900000000000e+004</v>
<v>3.950000000000000e+002</v>
<v>0.000000000000000e+000</v>
<v>0.000000000000000e+000</v>
<v>0.000000000000000e+000</v>
<v>1.517142857142857e+001</v>
<v>1.027035714285714e+003</v>
<v>1.241071428571428e+000</v>
<v>5.185714285714286e+000</v>
</d></root>'


set @data = dbo.svmScale(@data, 1, 0.5, 0.5)


If I cahnage one of the zeros in the given tag, the error message disappears. If i cut the given tag, the error message disappears. If I cut the given tag, and then paste the previous one in place of it, the error message APPEARS. So my conclusion is, that any tag can be wrong on a specific position in the XML. This makes me wonder.

Another wonderfull thing is, that if I take this CLR function, and the same TSQL code, and I do run it on my notbook with my SQL Express, no error message. But if I try to use it on the server, with SQL 2005 it drops me this error message. The resulting XML is coming from an SELECT FOR XML AUTO, so i suspect it not having illegal characters inside. This is probably true, becouse the above replace procedure can make the message disapear.


The server:
Product: Microsoft SQL Server Enterprise Edition
Op System: Microsoft Windows NT 5.2 (3790)
Platform: NT INTEL X86
Version: 9.00.3027.00
Language: English (United States)
Memory: 4095 (MB)
Processors: 2
Collation: SQL_Latin1_General_CP1_CI_AS
Clustered: False


The notebook:
Product: Microsoft SQL Server Express Edition
Op System: Microsoft Windows NT 5.1 (2600)
Platform: NT INTEL X86
Version: 9.00.1399.06
Language: English (United States)
Memory: 1015 (MB)
Processors: 1
Collation: SQL_Latin1_General_CP1_CI_AS
Clustered: False



I would be very greatul for any suggestions.


Thanks


Arpad Varga