System Parameters
'LU' Lock Unnecessary: Serial Files
 
Description Makes lock unnecessary on writing to serial files. (No Error #13 on WRITE without lock.)
 
Default Off. A "sticky" parameter. ProvideX generates Error #13: File access mode invalidif there is no lock on the first write to an open file number.


*Note* File access mode is checked once, on the first write after opening. An error won't be generated on a subsequent unlocked write if the file number is continuously open between writes (even if the parameter is switched off between writes).