how to get pc_offset.txt?

[comomind]

I runed your scirpt with my libapp.so file.
But I got some errors because pc_offset.txt does not fit to my libapp.so
so how to make pc_offset.txt for my libapp.so file?

0xdcdcf5f5
2977214
1441d6b13b8623fa7fbf61433abebd31
b'product no-code_comments no-dwarf_stack_traces_mode lazy_async_stacks no-lazy_dispatchers dedup_instructions no-asserts arm64-sysv compressed-pointers null-safety'
num_base_objects_ = 1025 num_objects_ = 149913 573 1132 instructions_table_len 22253 instruction_table_data_offset 16
Traceback (most recent call last):
File "/Users/comomind/Downloads/h2/pixel4/unpackFlutter/unpackFlutter-1441d6b13b8623fa7fbf61433abebd31/main.py", line 2692, in
parse_elf_file('res/libapp.so')
File "/Users/comomind/Downloads/h2/pixel4/unpackFlutter/unpackFlutter-1441d6b13b8623fa7fbf61433abebd31/main.py", line 2688, in parse_elf_file
isolate_snapshot_ = Snapshot(isolate_snapshot_data['blob'],isolate_snapshot_instructions['blob']).SnapshotSetupFromBuffer()
File "/Users/comomind/Downloads/h2/pixel4/unpackFlutter/unpackFlutter-1441d6b13b8623fa7fbf61433abebd31/main.py", line 2608, in SnapshotSetupFromBuffer
instructions_buffer=0).deserialize()
File "/Users/comomind/Downloads/h2/pixel4/unpackFlutter/unpackFlutter-1441d6b13b8623fa7fbf61433abebd31/main.py", line 1873, in deserialize
self.instruction_table_data.append(UntaggedInstructionsTable_DataEntry(ro_data[i]))
IndexError: list index out of range