Oracle Error Message
IMP-00035: input file string must be on a disk
Reason for the Error
On some platforms, import can read files from tape. This message is displayed if the first file in an export file set was on disk and you specified a tape device for a second or subsequent file.
Solution
Verify that you have specified the correct file name for the import file. Remember that all input files can be either on disk or all files can be on tape, but not mixed both tape and disk.