new system utility
 
			RCV
 
 MCR task to recover a file locked as a result of task abortion

 Original author	R B French	NOV 76	The Boeing Co
/L switch added		F. Borger	MAR 77	Michael Reese
/A switch, large file modifications,    FEB 81

calling sequence

MCR>RCV Filename[/SWitch]

 The normal REC[over] command  will only unlock a file that  was locked
due to abnornal termination.  After use, some files may end up 0 length
due to the end of file indicators not being properly reset.
 
RCV will unlock the file (if locked,) unless another task has write ac-
cess. It will then scan the file and rewrite file attributes to reflect
the actual size of the file (rather than 0).
 
 
RCV has two legal switches:
	/LA:NNN		Set number of records to be NNN
	/AD:NNN		Change number of records by NNN (+/-)
 
			NNN must be a legal single-precision decimal
			number (between -32767 and 32767)
 
For fixed length record files, this switch lets one override the result
of the recovery and explicitly determine the number of records.


The previous limitation involving large files and file header extensions
has been removed.