Unable to open file for input.

#3019   Non-recoverable error

Unable to open file for input.

Additional Information

File is 'X'.
    where X is the name of the file.

Explanation

The host operating system reported a failure when instructed to open a file. There are several causes of this error. Among them, a non-existent path name might have been specified, the disk could be full, or too many files are currently open.