IOResult

Return result of last file IO operation

Declaration

Source position: systemh.inc line 1416

Description

IOresult contains the result of any input/output call, when the {\$i-} compiler directive is active, disabling IO checking. When the flag is read, it is reset to zero. If IOresult is zero, the operation completed successfully. If non-zero, an error occurred. The following errors can occur:

dos errors :

2

File not found.

3

Path not found.

4

Too many open files.

5

Access denied.

6

Invalid file handle.

12

Invalid file-access mode.

15

Invalid disk number.

16

Cannot remove current directory.

17

Cannot rename across volumes.

I/O errors :

100

Error when reading from disk.

101

Error when writing to disk.

102

File not assigned.

103

File not open.

104

File not opened for input.

105

File not opened for output.

106

Invalid number.

Fatal errors :

150

Disk is write protected.

151

Unknown device.

152

Drive not ready.

153

Unknown command.

154

CRC check failed.

155

Invalid drive specified..

156

Seek error on disk.

157

Invalid media type.

158

Sector not found.

159

Printer out of paper.

160

Error when writing to device.

161

Error when reading from device.

162

Hardware failure.

Errors

None.

Example

Program Example35;

{ Program to demonstrate the IOResult function. }

Var F : text;

begin
  Assign (f,paramstr(1));
  {$i-}
  Reset (f);
  {$i+}
  If IOresult<>0 then
    writeln ('File ',paramstr(1),' doesn''t exist')
  else
    writeln ('File ',paramstr(1),' exists');
end.