The EXCEL.EXE process crashed. Exception code: 0xC0000409.

Hi,

We are currently facing excel crash issue when we are tring to save .dwg file from our desktop application...saveAs Dialog is triggering SaveAsExternal.exe application which is internally using excel

#  #Save As the file from within SPID.
  saveAsExternalProcess = Sys.WaitProcess("saveasExternal", 50000)
  if not saveAsExternalProcess.Exists:
    Log.Error("saveasExternal process did not start within timeout")
  else:
    btn = saveAsExternalProcess.FindChild("WndCaption", "&Close", 3)
    if btn.Exists:
          closeButton = btn
          closeButton.ClickButton()
    else:
      Log.Message("saveasExternal process completed (process exited or close button not found)"

exactly at line btn = saveAsExternalProcess.FindChild("WndCaption", "&Close", 3) we are getting the error as shown in the log The EXCEL.EXE process crashed.

Error:
Exception code: 0xC0000409.
Process identifier (PID): 11468.
Dump file: EXCEL_ue_9c850e00.dmp.

note: if i put a breakpoint at line btn = saveAsExternalProcess.FindChild("WndCaption", "&Close", 3) and wait till the process is completed it is working fine

can you please look into this issue, Thanks