In docs the function AppendConfigFileElem( filename, elemtype, elemkey, properties ); reports that fourth parameter must be an array of arrays or an array of structs...

Array of Arrays {propname,value}, or array of structs { name, value }

... while in function description and in cfgfile.em only the array of structs is mentioned...

Properties must be an array of structures, where each element is a structure containing a name member first, and a value member second.

... but in fact only the array of arrays seems to work coprrectly :?

Using an array of structs only write an empty element in .cfg file, even if function return 1.