The following error constants are defined:

Error Constant	Remarks
ErrExternalError	An error occured outside the library, usually in an API call.
ErrFileNotFound	File not found.
ErrFileTooLarge	The file is larger than 2147483647 bytes.
ErrInvalidSettingOrArgument	The argument or property setting is invalid.
ErrMissingDLL	Dynamic-link library missing or not found.
ErrNotAvailableInFreeVersion	This functionality is not available in the free version. You gotta upgrade mate!
ErrPathNotFound	Path not found.
ErrPermissionDenied	The operating system denied access to the specified file.
ErrStartAtOrEndAtPastEOF	The StartAt or EndAt arguments supplied to the CRC32File method are invalid because they refer to a byte position past the end of the file.
ErrTooLargeForOneChunk	The free version of the library does not support chunks. You have attempted to read a file larger than MaxChunkSize. See: CRC32File.
ErrZeroLengthFile	The file or argument is zero bytes, when this is not allowed.