Acrobat PDF File Format encountered the following PDF object(s) or operator(s) which are not supported or have problems:

Acrobat PDF File Format encountered an unknown operator “^2” in the file. This operator will be ignored but the file may be damaged.

Acrobat PDF File Format was not able to finish writing to the file “^2”.

Acrobat PDF File Format was not able to finish reading from the file “^2”.

Acrobat PDF File Format was unable to open the file “^2”.

Acrobat PDF File Format is having difficulties.