Hi,
This error probably indicates that you are missing some source files from the original package or they are corrupted.
Please make sure that you have the below files and folders in the original package folder to create the upgrade package:
Folders:
- Icon
- Intermediate
- Scripts
- Snapshot
Files:
- AppInfo
- Readme.txt
- Default Template File.
- Log file with the the <package_name>.txt format.
- pdr.xml file (the package configuration file).
- <package_name>.xpf file (The actual XPF package).
If any of these are missing or corrupt, the upgrade package creation might fail.
BTW, how big is the source package. If possible try to archive as .zip using 7-zip here and I will take a look
Regards,
Balachandar.M