Limits and Capacities
Files and Related
For details on ISAM-A files, see ISAM-A Specifications & Features.
Item |
Size / limit / capacity / description |
Updated in A-Shell build...; old value |
Files |
none; see ISMA-A File Size Limits. |
948 of Dec 05; 2GB |
Filenames |
72+8 (72 character filename plus 8 character extension). |
1662 of June 2019; 10+3 |
Expanded DO file |
~122K |
864 of Feb 04; 62K |
Random file record size |
No limit. Note, however, that this applies to READ and WRITE operations; there is a 2048 byte limit for SERCH. |
1246 of Apr 12; 64K |
EFS limit of sequential files open at once |
512 (or the FILES specification in miame.ini, whichever is less). |
1244 of Feb 11; 30 |
Range of file channels |
0 to 2^31 -1 |
|
Subroutines
Item |
Size / limit / capacity / description |
Updated in A-Shell build...; old value |
Number of parameters than can be passed to a subroutine, function or procedure |
1024 |
6.5.1628 of February 2018; 128 |
Size of subroutine name |
Six characters for internal SBR names, ten characters for SBX names. |
|
Size of a parameter passed in or out of a subroutine |
2**24-1 (16,777,215) bytes |
|
Number of subroutines on disk or called in a single program |
No limit |
|
Number of modules that can be loaded into user memory |
96 (per job). Subroutines are modules, but unless manually loaded (with LOAD.LIT) they will be auto-loaded, cached, and auto-updated if the SBX on disk gets updated. Auto-loaded modules will be freed to make room for new ones as needed. |
854 of Nov 03; 32 |
AUI: number of controls |
No limit. The control table expands as needed. |
1166.6.1 of 16 Nov 09; 600 |
AUI: number of menu items |
No limit. The menu table expands as needed. |
1166.6.1 of 16 Nov 09; 250 |
AUI_MENU: length of individual menu item command line |
200 |
|
AUI_MENU: length of individual menu item description |
64 |
1159 of Sep 09; 32 |
INFLD: length of entry (multi-line field) |
No limit |
1159 of Sep 09; 16K |
INFLD: length of multi-line edit box (|M) |
4K |
6.5.1671 of Nov 19; 1600 |
INFLD: SETDEF match length |
300 |
1111 of May 08; 50 |
INFLD: tooltip characters |
1023 |
5.1.1175, 300 |
MX_CLIPBOARD: buffer size |
No limit |
1194 of Nov 10; 3K |
MX_GETOFD: fname parameter length |
256 |
1222 of Jul 11; 80 |
MX_FINDFIRST, MX_FINDNEXT, MX_FINDEND |
20: number of directories (or sub-directory levels) open via MX_FINDFIRST for scanning with MX_FINDNEXT without closing via MX_FINDEND |
|
MX_PWCRYPT: password length |
128 |
1175 of Feb 10; 24 |
MX_SHELLEX: parameter length |
1024 individual parameter; 4096 for all parameters combined |
1202 of Jan 11; 500 |
PCKLST: rows |
32K |
|
REGEX: submatches |
100 |
1210 of Mar 11; 20 |
XTEXT: line length |
1998 characters |
1253 of June 12; 998 |
XTREE: columns |
200, may be editable or not |
1691 of Oct 2020; 100 |
XTREE: rows |
No limit |
1159 of Sept 09; |
XTREE: number of trees allowed |
No limit |
old limit = 32 |
XTREE: tooltip length |
1023 characters |
1205 of Feb 11 |
XTREE: multi-level trees |
63 |
1737 of Aug 23; 9 |
Compiler
Item |
Size / limit / capacity / description |
Updated in A-Shell build...; old value |
Length of a single BASIC statement including continuations |
16K |
6.5.1628 of February 2018; 128; 3K |
38 |
6.4.1547 of March 2017; 20 |
|
Nesting level of SWITCH statements |
8 |
|
Nesting level of TRACE_BEGIN / END blocks |
38 |
6.5.1644 of Aug 2018; 1 |
No limit |
5.1.1235 of Oct 11; ~400 |
|
Length of a variable or symbol name |
260 |
|
Length of a DEFSTRUCT name |
64 |
|
Number of dimensions (subscripts) in an array |
16 |
|
Number of variables |
Without /AV switch, about 6400 (fewer for arrays); with /AV, about 1.6 million |
|
Size of RUN module |
Without /A switch, calls/gotos limited to about 64K;; with /A switch, about 16 million |
|
Size of DATA embedded in RUN |
512K |
6.5.1657 of March 2019 |
Number of functions/procedures |
No specific limit other than memory available to compiler |
|
Number of defines, deftypes |
|
|
DATA statements |
1024 bytes |
6.5.1721 of November 2022; 512 bytes |
Other
Item |
Size / limit / capacity / description |
Updated in A-Shell build...; old value |
//XL parameter length |
512 characters |
6.5.1725 of Feb 203; 256 characters |
Ordered map key length |
Unlimited |
6.5.1716 of May 2022; 511 bytes |
Windows printer names |
100 characters |
5.1.1148 of May 2009; 50 |
Print filter SBX names |
10 characters |
6.2.144 of Jan 2016; 6 |
ATE server side timeout on initial handshake |
6 seconds |
6.2.144 of Jan 2016; 3 |
Scrollback buffer |
200 lines |
6.2.1422 of Jan 2016; 100 |
Associative array key |
511 bytes |
6.2.1421 of Nov 2015; 259 |
65,535 |
|
|
DEVICE name |
Three or four alphabetic characters, followed by one or two numeric digits, with a maximum length of five combined characters. |
|
Device definitions |
300 for Unix, 1000 for Windows |
|
Ersatz name |
One to ten alphabetic or numeric characters, starting with an alphabetic character, and immediately followed by a colon. |
|
Ersatz table auto-refresh |
Every 30 seconds |
|
Ersatz devices allowed |
1000 |
979 of Jan 06; 400 |
ERSATZ=fspec length |
160 |
1208 of Mar 11; 70 |
Printer ini file line length |
256 characters |
987 of Apr 07; 100 |
Trace message in ashlog.log, length |
2000 |
|
Trace.print statement, length |
16K |
1639 of July 2018; 800 |
Ashlog.log maximum filesize |
10MB; new file with extension .01, .02, etc. will be created when maximum filesize is reached |
1662 of June 2019; 3MB for Win, 5MB for Unix |
Command line length |
300 characters |
916 of Feb 05; 200 |
Number of GUI objects that can be defined at any one time |
No limit |
1166 of Nov 09; 250 |
Number of modules that can be loaded into user memory |
128 (per job). Note that subroutines are modules. |
6.5.1679 of April 2020; 96 |
Input CSV line length |
No limit |
995 of Sep 07; 4K |
INPUT statement, all forms |
No limit |
uncertain; 4K |
Windows printer name |
100 characters |
1148 of May 09; 50 |
Command line history buffer |
25 lines |
1168 of Dec 09; 10 |
VUE line length |
There is effectively no limit. When opening a file, VUE reads the longest line in the file and to that number adds 8K. |
6.5.1631 of February 2018, VUE edit 371; previously VUE looked only at the first 100 lines, and then added 1K, with an overall minimum limit of 4K. |
No limit |
|
|
HOST.LIT response capture buffer |
256 |
2.0(105) of Aug 11; 64K |
PAD$(expr,len) return expression length |
4096 |
1175 of Feb 10; 257 |
TAB(col) columns |
4095 |
1105 of Feb 08; 472 |
Buffer to expand strings containing %env% variables. |
No limit |
512 bytes; 6.0.1263 of Oct 12 |
Nested function/procedure calls |
Set limit of 99 as a way of reducing the likelihood and severity of problems caused by accidental infinite recursion. |
Unlimited; 6.1. 1387 of July 2014 |
Length of individual GDI print directives |
No limit |
512 bytes; 6.5.1664 of August 2019 |
