Error message when you try to debug an InfoPath form project that is built by using VSTO or VSTA: "System.Collections.Generic.KeyNotFoundException"

When you try to debug and test an InfoPath form project that contains command line arguments, you receive the following error message:You receive the error message if the InfoPath form project is built by using Microsoft Visual Studio Tools for Office System (VSTO) or Microsoft Visual Studio Tools for Applications (VSTA).

VSTO

To work around this issue in a VSTO project, follow these steps:

1. In Visual Studio, click ProjectName Properties on the Project menu, and then click Debug.
2. In the Start Action section, select Start external program, and then locate the Infopath.exe file.
3. In the Start Options section, type the following in the Command line arguments box:
   /preview "Path\manifest.xsf" /sampledata "Path\template.xml" /viewname "View 1" /inputparameters "Parameter"
   Note The view name may not be "View 1." You must verify the view name in the project.
   
   Parameter is the placeholder for the parameter that you want to pass.
4. Press F5 to debug the project.

VSTA

To work around this issue in a VSTA project, follow these steps:

1. Create a new XML file that is based on the InfoPath form template. The InfoPath form template is an .xsn file.
2. Save the XML file as Test.xml.
3. Click Start, click Run, type InfoPath "Path\Test.xml" /inputparameters "Parameter" in the Open box, and then click OK.