Can't find dependent .api file: 'le_mdc.api'

[jyijyi]

You can see here to add interface file

FX30S - Build Error - Couldn't find file 'le_avc.api'

Does your .sdef file in vscode show the airvantage directory: // Interfaces are searched for in the following directories. Each directory/sub-directory needs to // be identified here for the system to find and use .api files. interfaceSearch: { // Your project's search paths. ${MY_SYSTEM_DIR}/interfaces // Legato API search paths. ${LEGATO_ROOT}/interfaces **${LEGATO_ROOT}/interfaces/airVantage** ${LEGATO_ROOT}/interfaces/atServices ${LEGATO_ROOT}/interfaces/logDaemon ${LEGATO_ROOT}/…

Or you can see here

Can't find le_mdc.api

the default compilation command is just for some very basic app like helloworld, you can see it did not add much .api file. Actually you can refer the makefile for each sample application: