Update Project Server using PSI

Question

I need to update a project server 2007 file (tasks and custom fields) using PSI on a weekly basis. How do I update a required custom field in the project using C# and PSI web services? I get the following error when I save the changes:
false);
projectSvc.QueueUpdateProject(jobId, sessionId, projectDs,
Error:
PSCLientError Output:CustomFieldRequiredValueNotProvided        mdpropuid:
============================
System.Web.Services.Protocols.SoapException: ProjectServerError(s) LastError=Cus
tomFieldRequiredValueNotProvided Instructions: Pass this into PSClientError cons
tructor to access all error information
   at Microsoft.Office.Project.Server.WebService.Project.QueueUpdateProject(Guid
 jobUid, Guid sessionUid, ProjectDataSet dataset, Boolean validateOnly)
Code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Web;
using System.Web.Services.Protocols;
using System.Threading;
using PSLibrary = Microsoft.Office.Project.Server.Library;
using IntegratedMasterSchedule.ProjectWebSvc;
using IntegratedMasterSchedule.WebSvcLoginWindows;
using System.Net;
using System.Globalization;
namespace IntegratedMasterSchedule
public partial class MasterSchedule
private static CustomFieldWS.CustomFields customFieldClient = new CustomFieldWS.CustomFields();
[STAThread]
static void Main()
try
#region Setup
const string PROJECT_SERVER_URI = "http://ServerName/xxx";
const string PROJECT_SERVICE_PATH = "_vti_bin/psi/project.asmx";
const string QUEUESYSTEM_SERVICE_PATH = "_vti_bin/psi/queuesystem.asmx";
const string SESSION_DESC = "Sample utility";
Guid sessionId = Guid.NewGuid();
Guid jobId;
// Set up the Web service objects
ProjectWebSvc.Project projectSvc = new ProjectWebSvc.Project();
projectSvc.Url = PROJECT_SERVER_URI + PROJECT_SERVICE_PATH;
projectSvc.Credentials = CredentialCache.DefaultCredentials;
QueueSystemWebSvc.QueueSystem q = new QueueSystemWebSvc.QueueSystem();
q.Url = PROJECT_SERVER_URI + QUEUESYSTEM_SERVICE_PATH;
q.Credentials = CredentialCache.DefaultCredentials;
//Get the project
Guid projectId = GetProjectUidFromProjectName(projectSvc, "Project Name");
// Read the project you want
Console.WriteLine("Reading project from database");
ProjectWebSvc.ProjectDataSet projectDs = projectSvc.ReadProject(projectId, ProjectWebSvc.DataStoreEnum.WorkingStore);
#endregion
#region Change task name and update
// Check out the project
Console.WriteLine("Checking out project");
projectSvc.CheckOutProject(projectId, sessionId, SESSION_DESC);
// Make changes
// - Note: Task 0 is the summary task which can't be changed.
projectDs.Task[1].TASK_NAME += " Changed";
// Save the changes
Console.WriteLine("Saving changes to the database");
jobId = Guid.NewGuid();
projectSvc.QueueUpdateProject(jobId, sessionId, projectDs, false);
WaitForQueue(q, jobId);
#endregion
#region Check in
// Check in the project
Console.WriteLine("Checking in the project");
jobId = Guid.NewGuid();
projectSvc.QueueCheckInProject(jobId, projectId, false, sessionId, SESSION_DESC);
WaitForQueue(q, jobId);
#endregion
#region Exception Handling and Final
catch (SoapException ex)
PSLibrary.PSClientError error = new PSLibrary.PSClientError(ex);
PSLibrary.PSErrorInfo[] errors = error.GetAllErrors();
string errMess = "==============================\r\nError: \r\n";
for (int i = 0; i < errors.Length; i++)
errMess += "\n" + ex.Message.ToString() + "\r\n";
errMess += "".PadRight(30, '=') + "\r\nPSCLientError Output:\r\n \r\n";
errMess += errors[i].ErrId.ToString() + "\n";
for (int j = 0; j < errors[i].ErrorAttributes.Length; j++)
errMess += "\r\n\t" + errors[i].ErrorAttributeNames()[j] + ": " + errors[i].ErrorAttributes[j];
errMess += "\r\n".PadRight(30, '=');
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(errMess);
catch (WebException ex)
string errMess = ex.Message.ToString() +
"\n\nLog on, or check the Project Server Queuing Service";
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Error: " + errMess);
catch (Exception ex)
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Error: " + ex.Message);
finally
Console.ResetColor();
Console.WriteLine("\r\n\r\nPress any key...");
Console.ReadKey();
#endregion
static private void WaitForQueue(QueueSystemWebSvc.QueueSystem q, Guid jobId)
QueueSystemWebSvc.JobState jobState;
const int QUEUE_WAIT_TIME = 2; // two seconds
bool jobDone = false;
string xmlError = string.Empty;
int wait = 0;
//Wait for the project to get through the queue
// - Get the estimated wait time in seconds
wait = q.GetJobWaitTime(jobId);
// - Wait for it
Thread.Sleep(wait * 1000);
// - Wait until it is done.
do
// - Get the job state
jobState = q.GetJobCompletionState(jobId, out xmlError);
if (jobState == QueueSystemWebSvc.JobState.Success)
jobDone = true;
else
if (jobState == QueueSystemWebSvc.JobState.Unknown
|| jobState == QueueSystemWebSvc.JobState.Failed
|| jobState == QueueSystemWebSvc.JobState.FailedNotBlocking
|| jobState == QueueSystemWebSvc.JobState.CorrelationBlocked
|| jobState == QueueSystemWebSvc.JobState.Canceled)
// If the job failed, error out
throw (new ApplicationException("Queue request " + jobState + " for Job ID " + jobId + ".\r\n" + xmlError));
else
Console.WriteLine("Job State: " + jobState + " for Job ID: " + jobId);
Thread.Sleep(QUEUE_WAIT_TIME * 1000);
while (!jobDone);
static public Guid GetProjectUidFromProjectName(Project proj, string projectName)
Guid result = Guid.Empty;
ProjectDataSet dsProjectList = new ProjectDataSet();
dsProjectList = proj.ReadProjectList();
for (int row = 0; row < dsProjectList.Project.Count; row++)
if (projectName == dsProjectList.Project[row].PROJ_NAME.ToString())
result = dsProjectList.Project[row].PROJ_UID;
break;
return result;

Answer 1

Hi cochocip,
your projectDataSet has no custom field (required) set
The md_prop_uid is the uid for this custom field).
If your custom field is not based on lookup table, you can use a code like this:
Log to CustomFields webservice
Get Custom field's md_prop_uid using ReadCustomFields.....
and add this code after
// Make changes
// - Note: Task 0 is the summary task which can't be changed.
projectDs.Task[1].TASK_NAME += " Changed";
WebSvcCustomFields.CustomFieldDataSet newCF = customFieldsWS.ReadCustomFieldsByMdPropUids(new Guid[] {
p_md_prop_uid }, false);
WebSvcProject.ProjectDataSet.TaskCustomFieldsRow a = projectDs.TaskCustomFields.NewTaskCustomFieldsRow();
a.SetDUR_FMTNull();
a.SetFLAG_VALUENull();
a.SetINDICATOR_VALUENull();
a.SetNUM_VALUENull();
a.SetDUR_VALUENull();
a.SetDATE_VALUENull();
a.CUSTOM_FIELD_UID = Guid.NewGuid();
a.MD_PROP_UID = p_md_prop_uid;
a.MD_PROP_ID = newCF.CustomFields[0].MD_PROP_ID;
a.PROJ_UID = p_prjDS.Project[0].PROJ_UID;
a.TASK_UID = p_taskGuid;
a.FIELD_TYPE_ENUM = newCF.CustomFields[0].MD_PROP_TYPE_ENUM;
switch (newCF.CustomFields[0].MD_PROP_TYPE_ENUM)
case 21: //String
         a.TEXT_VALUE = p_value;
                break;
case 15: //number
         a.NUM_VALUE = Convert.ToDecimal(p_value);
                break;
case 4: //DAte
         a.DATE_VALUE = Convert.ToDateTime(p_value);
                break;
                default:
projectDs.TaskCustomFields.AddTaskCustomFieldsRow(a);
where p_value is the value that you want save in this field.
I hope this code can help you
Cheers,
Paolo