PC Ext: Err Msg: Error Code=1005, Device Error=000c

• Microsoft Mail for PC Networks, version 3.2

SYMPTOMS

External may report the following error in the SESSION.LOG when you try to send a mail message to a local area network (LAN) connected postoffice:

   A critical error has occurred
   Error Code=1005, Device Error=000c

CAUSE

This error is not an External related error. The External program is returning an error generated by Interrupt 24h in MS-DOS (Critical-Error Handler). This could have originated from MS-DOS or from the network shell, if a network drive is involved.

In most cases where External gives an error code of this nature, it indicates a problem accessing a network drive.

RESOLUTION

The Error Code= value consists of four digits. The last two digits are the most useful for identifying a problem affecting the External program. The hex values of 00 through 1A correspond with drives A through Z (00=A, 01=B, ..., 05=F, ..., 0C=M, ..., 1A=Z).

The Device Error= value is passed from the contents of the DI register, and only the lower byte of the DI register is valid. If the Device Error= value is not in the following table, it may be an invalid register entry that is getting corrupt in the process of generating the error.

Error Code      Meaning

00h             Write-protected disk
01h             Unknown unit
02h             Drive not ready
03h             Invalid command
04h             Data error (CRC)
05h             Bad request structure length
06h             Seek error
07h             Non-DOS disk
08h             Sector not found
09h             Printer out of paper
0ah             Write fault
0bh             Read fault
0ch             General failure
0fh             Invalid disk change (DOS 3 & later)

   Device Error=000c    (General failure)
   Device Error=0002    (Drive not ready)
   Device Error=000A    (Write fault)