C# Exception Handling Question using TRY-CATCH

How can I not throw an exception based on a response?   Right now the code below with hit the CATCH statement because of the web service call getlovvalueIDs fails to find something (Failed to find node from [ZIPS://List?id=100]).  I do not want throw an exception in this case and just want continue to the next record.  If I remove the TRY/CATCH block then the program will crash when it cannot find a node.   I just want the program to continue the foreach loop if nothing is found via the" var Data = Client.getLOVValueIDs(obj);".  

    foreach (var itemchildren in children)
        string newitemid = itemchildren.id.Remove(0, 4);
        LOVAttributeID = "Eco_LOV_" + newitemid;
        getLOVValueIDsRequestType obj = new getLOVValueIDsRequestType();
        obj.nodeURL = "ZIPS://List?id=" + LOVAttributeID;
        obj.accessContext = GetAccessContext(ObjUserProfile);
        var Data = Client.getLOVValueIDs(obj);
        if (Data != null)
            foreach (var EcomItem in Data)
    return LstLovOfEcomAttr;
catch (Exception ex)
    ErrorLog.LogError("Execution.aspx -> GetAllAttributeDetails(stepPortTypeClient ObjstepPortTypeClient, UserProfile ObjUserProfile)", ex.Message, System.Web.HttpContext.Current.Request.PhysicalApplicationPath);
    return null;

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Franck GaspozSoftware Architect, Technical ExpertCommented:
you can add a second  try/catch arround the var Data = ...    :

try {
    var Data = Client.getLOVValueIDs(obj);
   if (Data!=null) {
} catch {}

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