Fatal reading error...

[btraemoore]

I'm accessing autocad via COM and netloading a custom dll, but when i call my start function inside of my dll, intermittently i get a fatal error.. I do not get it when i call the method from in process, but only when i call it from COM. Here is the code from when get a list of paths.

 

 

private void Btn_ContClick(object sender, System.EventArgs e)
{
List<string> DwgList = getDWGStofix();
sendToExecute(DwgList,"faud");
}

bool SC = true;
private void sendToExecute(List<string> DwgList,string cmd){
PreloadCmds();
if (DwgList != null)
{
	foreach (string pth in DwgList)
	{
		if(SC)
			FixDwg(pth,cmd);
		else
			break;
	}
	if(AcApp != null)
		AcApp.Quit();
	if(SC)
		MessageBox.Show("Successful completion!!","ALERT");
	Application.Exit();
}
}

AcadDocument activeDWG;
private void PreloadCmds(){
string NewDWGPth = "C:/Documents and Settings/moorerb/application data/autodesk/autocad 2012 - english/r18.2/enu/template/acad.dwt";
try {
	activeDWG = AcApp.ActiveDocument;
} catch (Exception) {
	AcApp.Documents.Open(NewDWGPth,false);
	activeDWG = AcApp.ActiveDocument;
}
activeDWG.SendCommand(
	string.Format(
		"(command \"netload\" \"{0}InProcAudit.dll\")\n",dllPath.Replace('\\','/'))
);
}

string prevDWG;
private void FixDwg(string pth, string cmd)
{
activeDWG = AcApp.Documents.Open(pth,false);
activeDWG.SetVariable("USERI1",1);
if(prevDWG != null)
	activeDWG.SetVariable("USERS1",prevDWG);

// try to send the the activation command to the active drawing command line.
try {
	var*appState*=*AcApp.GetAcadState();
	while*(!appState.IsQuiescent){}
	activeDWG.SendCommand(string.Format("{0}\n",cmd));
} catch (System.Exception ex) {
	if(ex.Message.Contains("The remote procedure call failed.")){
		MessageBox.Show(
			string.Format(
				"We have encountered an error with drawing \"{0}\".",pth)
			,"Error"
			,MessageBoxButtons.OK
			,MessageBoxIcon.Exclamation
		);
		AcApp = null;
		SC = false;
	}
}
activeDWG.BeginClose += new _DAcadDocumentEvents_BeginCloseEventHandler(activeDWG_BeginClose);
while (activeDWG.GetVariable("USERI1") == 1)
{
	try {
		// hold for .5 seconds before checking for variable change
		Thread.Sleep(500);
	} catch (COMException CE) {
		if(CE.ErrorCode.ToString() == "-2147417848"){
			activeDWG.BeginClose -= new _DAcadDocumentEvents_BeginCloseEventHandler(activeDWG_BeginClose);
			activeDWG = null;
			break;
		}

	}
}
prevDWG = pth;
activeDWG.Save();
if(activeDWG != null)
	activeDWG.Close();
}      

 

I've been trying to figure it out for a few days now and cant seem to fix the problem.. My analysis is that im interupting autocad, to counter that i put an AcadState.isQuiescent() check in there.. any ideas?

Edited June 5, 2013 by btraemoore