 
 ZDEC (Zero-out Device Error Count) sets the error count field in the
 device UCB (UCB$W_ERRCNT) to 0. This program requires CMKRNL privilege,
 and executes at elevated IPL to lock the I/O database.
 
 To execute this program a symbol should be set as follows:
 
       $ ZDEC :== $mydisk:[mydir]ZDEC
	 

 To run ZDEC, enter:
 
       $ ZDEC [/OVERRIDE]  device
 
 where device designates a device. Logical names are accepted and translated.
 If the device is allocated (that is, if the owner field in the UCB is 
 non-zero), then ZDEC exits without changing the error count, unless the
 /OVERRIDE qualifier is used.
 
 Note that ZDEC does NOT zero out counts for CPU or MEMORY errors.
 
 ZDEC was developed under VMS Version 3, and will probably fail under
 Version 4. The author plans to support ZDEC and re-submit it when
 Version 4 is available.
 
 ZDEC has proven useful in zeroing out error counts without re-booting
 the operating system.