Attempted to read or write protected memory. This is often an indication that ot

[Anonymous]

that's the error i get when i try to create a query.

the code is:
acad = GetObject(, "Autocad.Application.17")
acadmap =acad.ActiveDocument.Application.GetInterfaceObject("AutoCADMap.Application")
atdr = acadmap.Projects.Item(0).DrawingSet.Add("C:\stam\dwg\Sheboygan\Counties.dwg")
prj = acadmap.Projects.Item(0)
qry = prj.CurrQuery()
qry.Clear()
mainqrybr = qry.QueryBranch
qrylf = mainqrybr.Add(EClassId.kLocationCondition,EJoinOperator.kOperatorAnd)

who know what's that..

[Anonymous]

Hello Sir,
Were you able to get any resolution to your problem? I am facing the same issue. I am using Autodesk 2004. As soon as I try to create the qrylf, my application crashes. If you have the solution would be kind enough to share it. I would really appreciate your help.
I am attempting this through VB6.

Best Regards,
Raj

[Anonymous]

Hi,

Could you solve the qrylf problem. If yes, please let me know how.

I am also facing the same problem.

Regards

[Anonymous]

This may give you some ideas ...
{code}
public void getfloorplan(double[] box)
{
Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
Database db = HostApplicationServices.WorkingDatabase;

ProjectModel prjModel = HostMapApplicationServices.Application.ActiveProject;
string current_projection = prjModel.Projection;
ProjectOptions prjOptions = prjModel.Options;
DrawingSet drawingset = prjModel.DrawingSet;

MapApplication mapApi = HostMapApplicationServices.Application;
Aliases aliases = mapApi.Aliases;
string The_Detailplan_alias = "FinalPathToDetailDWG";
string The_Detailplan = Get_("FinalPathToDetailDWG");
//Remove Alias
try
{
aliases.RemoveAlias(The_Detailplan_alias);
}
catch (MapException)
{
doc.Editor.WriteMessage("\nFailed to remove Detailplan alias ... probably OK.");
}
//Add Alias
try
{
aliases.AddAlias(The_Detailplan_alias, The_Detailplan);
}
catch (MapException)
{
doc.Editor.WriteMessage("\nFailed to add Detailplan alias. NOT good.");
}

drawingset.AttachDrawing(The_Detailplan_alias);

QueryModel qryModel = prjModel.CurQuery;
qryModel.Mode = Autodesk.Gis.Map.Constants.QueryType.QueryDraw;
qryModel.Clear();
// The root query object
QueryBranch qb_root = QueryBranch.Create();

// By location condition
LocationCondition locationcondition = new LocationCondition();
locationcondition.LocationType = Autodesk.Gis.Map.Constants.LocationType.LocationCrossing;
WindowBoundary windowboundary = new WindowBoundary(new Point3d(box[0], box[1], box[2]),
new Point3d(box[3], box[4], box[5]));
locationcondition.Boundary = windowboundary;
QueryBranch qblocation = QueryBranch.Create();
qblocation.AppendOperand(locationcondition);
// append to the root
qb_root.AppendOperand(qblocation);

// By Properties condition
PropertyCondition propertycondition = new PropertyCondition();
propertycondition.JoinOperator = Autodesk.Gis.Map.Constants.JoinOperator.OperatorAnd;
propertycondition.PropertyType = Autodesk.Gis.Map.Constants.PropertyType.Layer;
propertycondition.ConditionOperator = Autodesk.Gis.Map.Constants.ConditionOperator.ConditionEqual;

string The_DetailLayers = Get_("DetailLayers");
propertycondition.Value = The_DetailLayers;

// Make a branch
QueryBranch qbproperties = QueryBranch.Create();
qbproperties.AppendOperand(propertycondition);
// append it to the root
qb_root.AppendOperand(qbproperties);
// Construct it
qryModel.Define(qb_root);

ObjectIdCollection queried_floorplan_objs_collection = qryModel.Execute(drawingset);

// use the COM object to zoom
AcadApplication pApp;
pApp = (Autodesk.AutoCAD.Interop.AcadApplication)Autodesk.AutoCAD.ApplicationServices.Application.AcadApplication;
pApp.ZoomExtents();

drawingset.DetachDrawing(The_Detailplan_alias);
}
{code}

r,
dennis