Fatal Error when opening a drawing.

[dpayton]

When opening a dwg with the given code I get the following fatal error and autocad crashes. 

.

The dwg I am opening is corrupt, I can fix the dwg. But given the condition of client drawings this is likely going to be an issue I am going to run into again. I would like to be able to run my programs without it crashing when I run into a dwg I cannot open. I have tryed enclosing it in a try-catch but it still crashes aoutcad. 

How do I deal with these types of drawings without the program crashing? Is there a way to check a drawing to see if it can be opened beforehand? 

            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            using (doc.LockDocument())
            {
                using (Database AcDB = new Database(true, false))
                {
                    AcDB.ReadDwgFile(file, false, string.Empty);
                    AcDB.CloseInput(true);
                    using (Transaction AcTrans = AcDB.TransactionManager.StartTransaction())
                    {
                       //do stuff
                    }
                }
            }

[ActivistInvestor]

---

@Anonymous wrote:

When opening a dwg with the given code I get the following fatal error and autocad crashes. 

.

The dwg I am opening is corrupt, I can fix the dwg. But given the condition of client drawings this is likely going to be an issue I am going to run into again. I would like to be able to run my programs without it crashing when I run into a dwg I cannot open. I have tryed enclosing it in a try-catch but it still crashes aoutcad. 

How do I deal with these types of drawings without the program crashing? Is there a way to check a drawing to see if it can be opened beforehand? 

            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            using (doc.LockDocument())
            {
                using (Database AcDB = new Database(true, false))
                {
                    AcDB.ReadDwgFile(file, false, string.Empty);
                    AcDB.CloseInput(true);
                    using (Transaction AcTrans = AcDB.TransactionManager.StartTransaction())
                    {
                       //do stuff
                    }
                }
            }

---

I don't know of a way to detect a corrupt DWG file without trying to open it. If you can't catch the exception using catch(System.Exception) {...}, then try using catch{...} without an exception variable, and see if that catches it.

[dpayton]

The program never gets to the catch. As soon as it hits AcDB.ReadDwgFile(file, false, string.Empty); AcDB.CloseInput(true);  in the try autocad crashes.

[ActivistInvestor]

---

@Anonymous wrote:

The program never gets to the catch. As soon as it hits AcDB.ReadDwgFile(file, false, string.Empty); AcDB.CloseInput(true);  in the try autocad crashes.

---

Did you try what I suggested, and outside of the debugger?

If you did try it, and get the same result, here is one more thing you can try:

// using System.Runtime.CompilerServices;
try
{
   // Call ReadDwgFile() here
}
catch(System.Exception ex)
{
   RuntimeWrappedException rwe = ex as RuntimeWrappedException;
   if(rwe != null)
      Console.WriteLine(rwe.Message);
}

[Virupaksha_aithal · Accepted solution]

Hi,

As you are trying to open an drawing, please try with using (Database AcDB = new Database(false, false)).

[ActivistInvestor]

---

@Anonymous wrote:

The program never gets to the catch. As soon as it hits AcDB.ReadDwgFile(file, false, string.Empty); AcDB.CloseInput(true);  in the try autocad crashes.

---

I confess to having missed your use of true as the first argument to the Database constructor, which as @Virupaksha_aithal points out, is incorrect.

That's probably because since the beginning of time, I've always relied on this helper for opening DWG files:

public static class DatabaseHelper
{
   public static Database Open(string filename, FileOpenMode mode = FileOpenMode.OpenForReadAndWriteNoShare)
   {
      if(string.IsNullOrWhiteSpace(filename))
         throw new ArgumentException("filename");
      if(!System.IO.File.Exists(filename))
         throw new System.IO.FileNotFoundException(filename);
      Database db = new Database(false, false);
      try
      {
         db.ReadDwgFile(filename, mode, false, string.Empty);
         return db;
      }
      catch
      {
         db.Dispose();
         throw;
      }
   }
}

[dpayton]

Thank you Virupaksha.aithal and Activist_Investor for your help.

[autoDeveloper]

Hello @Virupaksha_aithal

I tried to use 

using (Database db = new Database(false, false))
{
        try
       {
              db.ReadDwgFile(docname, FileOpenMode.OpenForReadAndWriteNoShare, false, null);
             db.CloseInput(true);
      }
      catch (System.Exception ex)
     {

      }

}

But above code also crashing and show fatal error while running using accoreconsole.exe. Fatal error screenshot attached. Please help how console program can catch this issue.