Kiran Naik

This error occurs when you do NOT select the input file in the .net file of schema (.xsd) and you click on test map option of .net.

Scenerio: You are creating the .net biztalk project and schema file.

Please refer screenshots 1 and 2 to rectify the error.

Input instance file name is not specified for schema Cust1.

_ServiceCall_Insert.xsd. Search in Google: The instance file name can be
provided in the file properties of the schema in Solution Explorer.

Refer above Screenshots

Make sure Input Instance Filename has xml file selected.