What Dave said might be correct too, since Service is to transport the Data it must be Serializable or Distributed that would be a problem but to know the real problem - try to replicate the issue on Stored Proc by passing different Date formats as I can guess you have only one source code that's exposed to you all other are either dlls or exes, which you can't reverse them into VB6 code back. So focus on one Source Code you may probably have or know that's SP and try to replicate the problem.
Checking the VB6 code with the developer, we have identified the point where the error occurs: it cannot return a path of the configuration file (from which it reads the formatting of the dates), and uses the Windows API "GetEnvironmentVariable" .
I'm trying to figure out if there is any incompatibility between WCF and the VB6 API calls.
If you're hosting the WCF service in IIS or a Windows Service, it will be running under a different profile. Unless the environment variable is set as a system variable, it will be specific to your user profile, and will not be available to the WCF code.
in my application taht runs in Windows Embedded Compact 7 OS (with Compact Framework 3.5) I have a problem reading a xml file with DataSet.ReadXml.
I have made a little test to reproduce the problem:
PrivateSub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim dati As DataSet = New DataSet("Programmazione")
Dim fname AsStringDim j AsInt32Try
fname = "\Program Files\SmartDeviceProject1\default_19.prg"'this works'fname = "\Program Files\SmartDeviceProject1\default_20.prg" 'this doesn't workDim fs AsNew FileStream(fname, FileMode.Open, FileAccess.Read)
Dim xr As XmlReader = System.Xml.XmlReader.Create(fs)
j = dati.ReadXml(xr) 'j = 3 = XmlReadMode.InferSchema
Catch ex As Exception
I have two test file: default_19.prg and default_20.prg.
The first is a little shorter than the second and it is read without problem, the second fails without raising an exception (at least an exception that I can catch).
I don't know if it is a file dimension problem or something else.
The two files are quite long and I apologize for this but I post them here otherwise who could help me?