Getting eInvalidInput error while switching to modelspace from paperspace

[anirudha_kulkarni]

Hello friends,

 

 

I stuck in this eInvalidInput error, I am trying to open dwg file as below

"DocumentCollection docMgr = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager;

var fileName = Path.GetFileName(file.FullName);
dwgFlpath = folderpath + "\\" + fileName;
DocumentCollectionExtension.Open(docMgr, dwgFlpath, false);"

 

The opened drawing is in paperspace when I try to switch it into model space then it gives me error of eInvalideInput.

 

Please guys help me.. Thanks in advance....