| ERROR | unable to open output file |
| CAUSE | The precompiler could not open an output file. This could be a generated code output file(.c file) or a listing file. This message can result from many causes. For example: o) A pathname for a specified output file contains a non-exixtent directory. o) An operating-system error occured because the file system or disk is full. o) Write permission on the specified directory or directories in the path do not exist. |
| ACTION | Track down the cause of the error, as suggested above, and correct it. |