I don't know exactly what went wrong so I will briefly introduce the whole process
Step1. Unpacking, using the tool: NCA-NSP-XCI_TO_LayeredFS_v1.6
Step2. modified and replaced part of the files inside the above romfs
Step3. Repacking, using the tool: hacpack GUI 1.36
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Step1. Unpacking, using the tool: NCA-NSP-XCI_TO_LayeredFS_v1.6
- NSP extract, get tik and nca files
- Use the above tik to split the biggest nca file into exefs and romfs
Step2. modified and replaced part of the files inside the above romfs
Step3. Repacking, using the tool: hacpack GUI 1.36
- Set up the output path, keys file, title ID, exefs folder path, romfs folder path
- Click Build NCA...
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