This means that there is some error while building your application. Check that your application does not have any error.
>> makesis.exe returned with exit value = 1
>> file I/O fault
>> Error : Cannot find file : ..\..\..\epoc32\RELEASE\gcce\UREL\LbsReference.exe
Yes you can always create .sis file after modifying same API examples provided you do not have any error.
4. Can anybody tell me what I am missing in the .sis creation process. Can we create the .sis file after modify the sample API examples ?
Hope this helps.