Hi all: I received several responses to my question. May thanks to all who responded. Original question is below. Basically there were two suggestions for how to solve the problem: 1. Put some portion of the command line in quotes (either entire command line or project filename) 2. Use the 8.3 naming convention for the project file (e.g. "C:\My Documents\My Project.apr" becomes "C:\MYDOCU~1\MYPROJ~1.APR") I could not get suggestion #1 to work, which suggests the problem lies with ArcView and not Windows. I was able to get suggestion #2 to work. I view this as a workaround, however, because in my application I do not know the name of the project file until the user provides it at installation. I now need to figure out how to automatically get the 8.3 filename for my .apr file through a call from either InstallShield or MS Access - Michael Hickey suggested there may be a Windows DLL call that would return the 8.3 filename for a full filename, which would do the trick but I have not yet had a chance to search one out. Anyone ideas here would be appreciated also! Regards, Colin. Colin Daniel ESSA Technologies Ltd. Ottawa, Ontario, Canada www.essa.com email: cdaniel@essa.com Original question: I am writing an application that starts ArcView, with a particular project, from Microsoft Access. We have been successful in doing this previously by invoking a macro in Access using the command line expression such as: C:\ESRI\AV_GIS30\ARCVIEW\BIN32\ARCVIEW.EXE C:\MyProject.apr Unfortunately we have been unable to get this to work when the project path/name has any blanks. For example, the same command line with the following project filename does not work, as ArcView fails to recognize the project: C:\ESRI\AV_GIS30\ARCVIEW\BIN32\ARCVIEW.EXE C:\My Documents\My Project.apr Can anyone tell me how to invoke a project from the command line when the project path/name has blanks in it? Will SUM.