The below is my configuration:
Application name is :myshop_bcc
Applicaiton Location : ATG\ATH10.2
The below is my eclispe configuration for assembling the ear.
Run --> ExternalTools -->External Configuration -->Left Navigation(Programs)
Location is :C:\ATG\ATG10.1.1\home\bin\runAssembler.bat
Working Directory : ear location (c:\ear\)
Arguments: myshop_bcc.ear -m DCS-UI.Versioned BIZUI DafEar.Admin myshop_bcc
Note : Form command prompt i am able assmble the ear file.
You have mentioned that your module is at ATG\ATG10.2 but in the external tool configuration in your eclipse you seem to be mentioning directory pointing to ATG10.1.1. You should correctly specify this as per the version that you are planning to use and as per the ATG location where your module has been created.