VPE batch process error

[rudolfearle]

We have implemented the VPE control (64 bit) within a dll (ver7.1), and via a windows service run a batch process. It is a multi-tread environment and each thread handle between 1 and 4000 reports.

Once deployed to the runtime environment and running the service, the service throw an error “error creating window handle. The VP document is not open call OpenDoc() first”. It seems the service run out of Handles and I tried the following link as a solution but did not work: viewtopic.php?f=2&t=108

I do close the vpedoc once processing is completed. I cannot replicate error in debug mode on dev.

The stack trace:

at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
at IDEALSoftware.VpeEnterprise.VpeControl.OpenDoc()

and in event viewer:error on ntdll.dll


Not sure if this problem is common or advice on solution.

[rudolfearle]

okay for future reference I solved the problem myself.

i made the following change and error went away:

objForm = System.Windows.Forma.Form();
VpeControl doc = new VpeControl();
doc.parent = objFrom;
doc.OpenDoc();

......
doc.Closedoc();
objForm.close();
objForm = null;

[IDEAL Software Support]

Thanks for the update. It is not the internal VPE-DLL window, which causes the problem, because this is closed when CloseDoc() is called. It is the internal window of the encapsulating C# control, which is not destroyed. We do not consider this as a bug, because if you place the VPE control on a form, the form will destroy the control when the form is destroyed. If you create the VPE control by code, you are responsible for destroying it.