ACUCOBOL-GT is an ANSI-85 COBOL compiler and runtime system (ANSI X3.23-1985). ANSI COBOL is divided into a series of required and optional modules, each of which has various levels of implementation. ACUCOBOL-GT conforms to the following levels for each of the required modules (range of levels in parentheses):
Nucleus (1-2) Level 2 Sequential I-O (1-2) Level 2 Relative I-O (0-2) Level 2 Indexed I-O (0-2) Level 2 Inter-Program Communication (1-2) Level 2 Sort-Merge (0-1) Level 1 Source Text Manipulation (0-2) Level 2 Segmentation (0-2) Level 1
ACUCOBOL-GT does not support the optional modules: Report Writer, Communication, or Debug.
The following sections summarize various extensions and limitations ACUCOBOL-GT has with respect to the standard.
ACUCOBOL-GT has the following limits:
Maximum Program Size: 1 MB code, 1 MB data (compilation unit) 1 GB data for large model
Maximum Program Size: Limited only by machine
(run unit) memory
Maximum Record Size: 32767 bytes
Number of Indexed Keys: Primary + 119 alternates
Number of Segments per Key: 16
Maximum Indexed Key Size: 250 bytes
Maximum Sort Key Size: 32767 bytes
Maximum Number Sort Keys: 255
Maximum duplicate keys: No limit
Maximum File Size: host system dependent;
logical limit: 128 terabytes if Vision Version 4 is used;
for all other file systems the logical limit is 2048 MB
Maximum Data Item Size:
Alphanumeric: 65520 bytes*
Numeric: 18 digits
Edited: 255 bytes
Maximum size of an external data item: 64K (larger in large model)*
Maximum Table Indexes: 15
Maximum Open Files/Process: 255 (128 on MS-DOS)
Maximum Literal Size: 4096 characters
Maximum Paragraph Size: 32767 bytes
Maximum Pop-Up Windows: Limited only by machine memory
Maximum Picture String: 100 Characters
SPECIAL-NAMES Switches: 26
Maximum number of OCCURS: 65,280
Maximum nesting:
IFs: limited by machine, least maximum=2720 PERFORMS: No limit PERFORMS n times: No limit CALLS: No limit Recursive CALLS: 32767
Maximum number of data and procedure names: Limited only by machine memory
Maximum number of parameters in a CHAIN statement: 50
*For exceptions, see the Reference Manual, section 5.1.6 on "Large Data Handling."