0721

Summary:	Attempted I/O conflict with Open
Cause:	An I/O conflicts with corresponding open statement. Some possibilities: Read Attempt to read a file that is opened for Output. Attempt to read Rec= or Key= to a file opened sequential. Attempt to use read on a display file Open Attempt to create a new file when open is for Input only ,Use specified on a Input only open statement. Version Attempt to access version number on file that is not internal or a key file that is opened as internal Attempt to reset version number on file that is not opened OutIn Write/Rewrite/Print Attempt to ReWrite a record in file that was opened for Output Attempt to Write #0 Attempt to write to a display file
Remedy:	Change the I/O statement so that it matches the way the file was opened. For the situations noted above: Read Read may be executed only on files opened for Input or OutIn. Read Rec= or Key= may be executed only on files opened relative. Use Input or LInput to read display files. Open If a new file is to be created, OPEN must be for Output or OutIn. Remove the ,Use from the syntax. Version Version may be executed on non-keyed files opened internal only. If version number is to be reset, file must be opened OutIn Write/Rewrite Change Output on the Open Statement to OutIn Change the invalid file handle to a valid one Change the write to a print