[Lazarus] EXC_BAD_ACCESS, Could not access memory

[dmitry boyarintsev]

> Stream.Read (HeaderLen, SIZEOF (HeaderLen));
>
> where information header's length is stored into binary.

HeaderLen is integer, right?
have you checked HeaderLen being large that sizeof(TSomeHeader)

it's possible, especiialy for Mac files, because of PowerPC and some
structures may use Big-endian byte order, rather than Intel
(little-endian)

thanks,
dmitry