$MVV(n) Special Variables by Number

Subscript Range	Data Type
0 through 15	Single-character data
16 through 127	String data
128 through 193	Integer data
194 through 255	Boolean data

Subscript Range	Default Value
0 through 7	Dynamic array delimiter characters with ASCII values 248 through 255: 0=@IM ($CHAR(255)), 1=@FM/@AM ($CHAR(254)), 2=@VM ($CHAR(253)), 3=@SM/@SVM ($CHAR(252)), 4=@TM ($CHAR(251)), 5=$CHAR(250), 6=$CHAR(249), 7=$CHAR(248).
8 through 14	Empty string
15	Question mark (?) character
16 through 37	Empty string. 16=@ID, 17=@RECORD, 19=MVBasic device, 22=@FILENAME, 23=@COMMAND/@SENTENCE, 25=footer, 35=@STDFIL, 36=@SYSTEM.RETURN.CODE.
38 through 41	Components of the current date, as integers: 38=@DAY, 39=@MONTH, 40=@YEAR (2-digit year), 41=@YEAR4.
42 through 84	Empty string. 42=@TTY, 44=@ANS, 46= SQL error message during index operations, 51=spooler print job list, 62=proc pib, 63=proc sib, 64=proc pob, 65=proc sob, 66=errors, 67=proc errors, 70= proc name, 71=options, 84=@PARASENTENCE.
85	Question mark (?) character
86 through 127	Empty string. 88=@DICT, 95=@CONV, 96=@FORMAT, 97=@HEADER
128	MVBasic status. On failed lock operation, contains the pid of the lock owner.
129 through 131	The integer 0.
132	The integer 10
133 through 135	The integer 0. 133=@LEVEL
136	136=@DATE. The date when the current process started, in internal $HOROLOG format. An integer count of days since January 1, 1841.
137	137=@TIME. The time when the current process started, in internal $HOROLOG format. An integer count of seconds since midnight.
138 through 147	The integer 0. 145=@SELECTED
148	The integer 4
149 through 255	The integer/boolean value 0. 156=@NB, 157=@ND, 158=@NI, 159=@NV, 160=@NS. 169=SQL error code during index operations. 174=COMMON unique node subscript ID. 176=MVBasic lockport; on failed lock operation, contains the pid of the lock owner. 210=CMQL generated a Select List. 213=STACKCOMMON on/off. 218=%SYSTEM.MV.InputDataOnly() method setting.