puzzled! eWasOpenForWrite error

[289924688488291]

hello,everybody!
I get a error 'eWasOpenForWrite' in the code below, can anyone tell me how to tackle this problem?
thanks.

        private static void CheckInference(List<Solid3d> solids) {
            Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;
            using (Transaction tran = db.TransactionManager.StartTransaction()) {
                BlockTable blockTable = tran.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                BlockTableRecord blockRecord = tran.GetObject(blockTable[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;

                for (int i = 0; i < solids.Count - 1; i++) {
                    Solid3d solid1 = solids[i];
                    for (int j = i + 1; j < solids.Count; j++) {
                        Solid3d solid2 = solids[j];
                        if (solid1.Layer != solid2.Layer) {
                            if (solid1.CheckInterference(solid2)) {
                                Solid3d copySolid1 = solid1.Clone() as Solid3d;
                                copySolid1 .BooleanOperation(BooleanOperationType.BoolIntersect, solid2.Clone() as Solid3d);//------eWasOpenForWrite error occured here
                                copySolid1 .ColorIndex = 1;
                                blockRecord.AppendEntity(copySolid1 );
                                tran.AddNewlyCreatedDBObject(copySolid1 , true);
                                tran.Commit();
                            }
                        }
                    }
                }
            }
        }

[BlackBox]

Welcome to AUGI!

First, I do not understand why you choose to iterate a valid selection set based in the layers supplied, only to check for solids, when you could simply include the solid as part of your filter.

Second, if I am understanding your code correctly, you recursively call CheckInterference() on an ObjectId that you've already opened using the Transaction, hence the eWasOpenForWrite error. Just a guess.

HTH

[289924688488291]

thanks , RenderMan.
but if not call the function CheckInterference() recursively ,how can i get the Intersection of any two solids in the list?
any idea?

[BlackBox]

but if not call the function CheckInterference() recursively ,how can i get the Intersection of any two solids in the list?
any idea?

Actually, I am mistaken... I accidentally misread your CheckInference() Method, and thought you were calling it recursively (when in fact you're calling the CheckInterference() Method... Presumably, the solid2 Object being open for write, should not in fact be an issue.

I've never actually needed to code something like this, so I'm not exactly sure what would be best here... This article, and the comments posted below it, may be of use.

Hopefully someone more knowledgeable will be along shortly.

[BlackBox]

Per the Edit 3D Solid (.NET) Reference... Consider replacing this line:

                    if (solid1.CheckInterference(solid2))

... With this, and see if that helps:

                    if (solid1.CheckInterference(solid2) == true)

Unless I am overlooking something, this is the only real difference I see between the example found in the documentation, and your code.

HTH

[antonin107523]

If you clone an entity, you must AppendEntity to Block Table Record and AddNewlyCreatedDBOjbect to a Transaction and only then you can use them for other operations.