OK - no errors.

The "GIF" signature at the start of the file could not be found.

Unable to open the file for reading. The file could already be open.

A data block was read which was shorter than its declared length.

A colour table was shorter than its declared length.

One or more frames has no active colour table.

A data block begins with an invalid byte. Valid bytes are: 0x2c - image separator 0x21 - extension 0x3b - terminator 0x00 - actually invalid but supported by the decoder

The decoder is still trying to read more data from the input stream but has reached the end of the stream.

An image block contains a LZW minimum code size which would result in a clear code larger than the maximum stack size.

An application extension declared itself as a Netscape extension but does not follow the format of a Netscape extension.

The identification block is longer than 11 bytes.

A data block was read which was longer than its declared length.

The table-based image data contained data for fewer pixels than expected given the supplied image size.

The decoder's dictionary is full, it was not possible to increase the code size given the maximum possible size of the dictionary.

A code was read which is not in the dictionary and is not the next code available to be added to the dictionary.

The next available code is greater than or equal to the maximum stack size.

The frame's LZW image data decoded to a zero-length array.

An unexpected block terminator was encountered.