Locked Array Com Exception

Question

I've got a problem with using arrays in an API method in a Thread.
Locking the arrays didn't work.

Thread thrCreate = new Thread(createThread);
thrCreate.SetApartmentState(ApartmentState.STA);
thrCreate.Start();
private void createThread()
{
 IEdmAddCustomRefs2 pdmRefs = (IEdmAddCustomRefs2)vault2.CreateUtility(EdmUtility.EdmUtil_AddCustomRefs);
 IEdmFile5 pdmRefFile = (IEdmFile5)pdmResult; 
 int[] iRefCount = new int[1];
 iRefCount[0] = 1;
 string[] strRefPath = new string[1];
 strRefPath[0] = strPDFPath + strSerName + ".pdf";
 lock (strRefPath)
 {
 lock (iRefCount)
 {
 pdmRefs.AddReferencesPath2(pdmRefFile.ID, ref strRefPath, ref iRefCount);
 }
 }
}

COM Exception is called DISP_E_ARRAYISLOCKED.

• Richard: A lock statement will not help here. The lock being referred to in the HRESULT's name is the locking of the COM array contained in a Variant.
• Hans Passant: The error basically indicates that running this code on a worker thread was not a good idea. You'll have to ask SolidWorks what it is possible, but the expected response is "don't do that".
• Richard: Within the implementation of IEdmAddCustomRefs2 there is an safe array where the calls to SafeArrayLock exceed the calls to SafeArrayUnlock

Answer 1

I am now using the AddReferences method and I am not getting the Exception anymore.

Here is the updated code:

Thread thrCreate = new Thread(createThread);
thrCreate.SetApartmentState(ApartmentState.STA);
thrCreate.Start();
private void createThread()
{
 IEdmAddCustomRefs2 pdmRefs = (IEdmAddCustomRefs2)vault2.CreateUtility(EdmUtility.EdmUtil_AddCustomRefs);
 IEdmFile5 pdmRefFile = (IEdmFile5)pdmResult; 
 string[] strRefPath = new string[1];
 strRefPath[0] = strPDFPath + strSerName + ".pdf";
 pdmRefs.AddReferencesPath(pdmRefFile.ID, ref strRefPath);
}