i develop an aplication with visual c# 2005 using an API of mappoint 2006. When i load a card (of europe for my case ), i have the following problems : System.runtime.interropservice.Comeexception s'est produite dans axinterrop.mappoint 2005 Information supplémentaires : le fichier que vous avez choisi n'est un pas un fichier mappoint 2005 in english : the file is not a mappoint 2005 map ????? strange So i use the following code to load the map : string objtemplate = "D:/bidule.ptt"; // just example mappoint.map objMap = null; axMappointcontrol1.NewMap(objtemplate); objMap = axMappointControl1.ActiveMap; objMap.MapStyle= MapPoint.GeoMapStyle.geoMapStyleData; i used the good references of mappoint, i use the good map too (europe map, it's on the good path). Moreover i tested my code on an other computer, and it works . I want to know, like i use an old version of excel if the probleme can becom of that ?? If someone can help me . ps : sorry for my english, im french and english course are not the better in the world in france.